I noticed that the death of the profile of Jeremiah Allen, Jr., of Boston is listed as 1750-1755. But the records show that Jeremiah died on 9 Aug 1750 in Wilmington:
Death of Jeremiah Allen of Boston, at Wilmington, issue of 9 Aug 1750, [Index of obituaries in Boston newspapers, v. 2, Deaths outside Boston, A-Johnson, Chloe, 1704-1795, p. 13. Boston Athenaeum, G.K. Hall & Co., Boston, 1968].
Note the baptism of Jeremiah son of Jeremiah (dec'd) and Elisabeth Allen, 1 Sep 1750 [First Church, Boston, 1630-1847, Transcripts: d) film 0856693, item 3, baptisms, p. 294]
There are two mentions in Boston newspapers of Jeremiah's death, but neither show the actual date of the death:
By the Wilmington we have Advice of the Death of Mr. Jeremiah Allen of this Town [Boston News-Letter, Sunday, Aug 09, 1750, Boston, MA, Issue: 2517, Page: 2; Boston Evening-Post, Thursday, Aug 13, 1750, Boston, MA, Issue: 783, Page: 2, both from https://www.genealogybank.com/].
Erica,
Another note about the children of Jeremiah Allen, d. 1750. Jeremiah's brother James Allen died and was probated in 1757. The record lists 5 children of Jeremiah: James Allen, William Allen Jeremy Allen & Martha Allen minors children of Jeremy Allen, and Abigail Belcher wife of hon. Jonathan Belcher of Halifax Nova Scotia Esq. & one of dau. of Jeremy Allen dec'd brother to said James. Abstracts of the records are:
Abiel Walley Esq. guardian to James Allen, William Allen Jeremy Allen & Martha Allen minors children of Jeremy Allen late of Boston merchant dec'd, & Jonathan Belcher Esq. & Abigail his wife one on the daus. of said Jeremy, petition that the minors & Abigail with Jeremy Wheelwright of Boston gent. are the only heirs of James Allen late of Boston Esq. dec'd intestate to divide exclusive of widow's 1/3, order to divide of 2/3 of real estate of said James Allen dec'd to each of children of his brother & sister dec'd, dated 6 Mar 1757 [Suffolk Probate, v. 54, p. 111-120, also Docket #8698].
Divided of 2/3 of real estate of James Allen late of Boston esq. dec'd intestate, to Abigail Belcher wife of hon. Jonathan Belcher of Hallifax Nova Scotia Esq. & one of dau. of Jeremy Allen dec'd brother to said James 1/6 of 2/3, to Jeremy Wheelwright of Boston gent only son & heir of Mary Wheelwright dec'd sister of the sister to the said James Allen dec'd 1/6 of 2/3, includes 420 acres part of land in Holden in Worcester Co. said James dec'd purchased of his brother Jeremy Allen dec'd, to James Allen & Martha Allen minors 2 of the children of said Jeremy Allen dec'd brother to said James Allen Esq. dec'd 2/6 of 2/3 of real estate of their uncle dec'd, to William Allen one of children of Jeremy Allen dec'd 1/6 of 2/3 of real estate of his uncle said James Allen dec'd, to Jeremy Allen the other son of Jeremy Allen dec'd 1/6 of 2/3 of real estate of his uncle James Allen dec'd, includes 300 acres in Holden part of land James Allen Esq. purchased of Jeremy Allen dec'd, dated 11 Apr 1758 [Suffolk Probate, v. 54, p. 111-120, also Docket #8698].
Jeremiah Allen, Jr., married Mrs. Abigail Waldo:
Mr. Jeremiah Allen Junr. & Mrs. Abigail Waldo both of Boston married, Mar. 21, 1727/8 [A volume of records relating to the early history of Boston, containing Boston marriages from 1752 to 1809. Municipal Printing Office, Boston, 1903, Newbury, Boston out-of-town marriages]
So it appears that there two Abigail's associated with Jeremiah Allen, Jr., a first wife Abigail Waldo, and a daughter Abigail (Allen) Belcher.
Edward Tyng guardian of Abigail Allen, age about 6 in 1734 (b. abt. 1728), records in Suffolk Co. probate, Docket #6592:
1) Edward Tyng of Boston merchant named guardian of Abigail Allen minor aged about 6 years granddau. of Jonathan Waldo late of Boston gent. dec'd, dated Boston 20 May 1734 [Suffolk Co. Probate, v. 30, p. 273-274].
2) Bond of Edward Tyng merchant, John Tyng gent. & Isaac Dupee merchant all of Boston, dated 20 May 1734, Edward Tyng guardian of Abigail Allen minor aged about 6 years granddau. of Jonathan Waldo late of Boston gent. dec'd [Suffolk Co. Probate, v. 18 (new series), p. 509-510].
3) Abigail Allen of Boston spinster, whereas Edward Tyng of Boston Esq. on 20 May 1734 was guardian in right of her grandfather Jonathan Waldo late of Boston merchant dec'd, guardian discharged, dated 25 Jul 1749, Abigail Allen ack. Boston 25 Jul 1749 [Suffolk Co. Probate, v. 42, 509-510?].
The birth of Abigail daughter of Jeremiah, in about 1728, is consistent with the marriage of Jeremiah and Abigail (Waldo) Allen, in Mar. 21, 1727/8.
Finally, probate records of the family of Jeremiah Allen, latest to earliest.
1) Divided of 2/3 of real estate of James Allen late of Boston esq. dec'd intestate, to Abigail Belcher wife of hon. Jonathan Belcher of Hallifax Nova Scotia Esq. & one of dau. of Jeremy Allen dec'd brother to said James 1/6 of 2/3, to Jeremy Wheelwright of Boston gent only son & heir of Mary Wheelwright dec'd sister of the sister to the said James Allen dec'd 1/6 of 2/3, includes 420 acres part of land in Holden in Worcester Co. said James dec'd purchased of his brother Jeremy Allen dec'd, to James Allen & Martha Allen minors 2 of the children of said Jeremy Allen dec'd brother to said James Allen Esq. dec'd 2/6 of 2/3 of real estate of their uncle dec'd, to William Allen one of children of Jeremy Allen dec'd 1/6 of 2/3 of real estate of his uncle said James Allen dec'd, to Jeremy Allen the other son of Jeremy Allen dec'd 1/6 of 2/3 of real estate of his uncle James Allen dec'd, includes 300 acres in Holden part of land James Allen Esq. purchased of Jeremy Allen dec'd, dated 11 Apr 1758 [Suffolk Co. Probate, v. 54, p. 111-120; Docket #8698]
2) Abiel Walley Esq. guardian to James Allen, William Allen Jeremy Allen & Martha Allen minors children of Jeremy Allen late of Boston merchant dec'd, & Jonathan Belcher Esq. & Abigail his wife one on the daus. of said Jeremy, petition that the minors & Abigail with Jeremy Wheelwright of Boston gent. are the only heirs of James Allen late of Boston Esq. dec'd intestate to divide exclusive of widow's 1/3, order to divide of 2/3 of real estate of said James Allen dec'd to each of children of his brother & sister dec'd, dated 6 Mar 1757 [Suffolk Co. Probate, v. 54, p. 111-120; Docket #8698]
3) Will of Mary Allen late of Boston widow dec'd, proved, administration to his son Jeremiah Allen one of the executors (James Allen the other executor renounced), dated Boston 22 Aug 1749; will of Mary Allen of Boston widow, to my son hon. James Allen Esq. the picture of my late husband Jeremiah Allen Esq. dec'd, to my son Jeremiah Allen 20s, to my grandson Jeremiah Wheelwright £100, to my granddau. Martha Allen a suit, Negro man Harry to set free, remainder to my grandau. Mary Allen if of age or marriage, but if she dec'd to my granddau. Martha Allen, my 2 sons James & Jeremiah Allen executors; 2 Aug 1749 will presented by Jeremiah Allen one of executors (James Allen renounced) & witnesses made oath of will of Mary Allen, dated Boston 22 Aug 1749 [Suffolk Co. Probate, v. 43, p. 41-43; Docket #9338].
4) Bond of James Allen Esq. & Jeremiah Allen gent., dated 16 Jan 1745[/6?], James & Jeremiah Allen executors of their father Jeremiah Allen late of Boston Esq. dec'd, to pay all debts & legacies of their father Jeremiah Allen dec'd; & account of the estate of Jerh Allen dec'd to the estate of Abial Walley Esq., includes Sep 1750 to cash paid Jere Allen's widow; & petition of James Allen one of the executors of Jeremiah Allen Esq. dec'd, testator made will 26 Jun 1736 since dec'd, his two sons James & Jeremiah Allen executors, petitioner that Jeremiah Allen the other executor to render & to appoint persons to divide of estate, signed by Jas Allen, dated Boston 30 Dec 1745; & answer of Jeremiah Allen one of the executors of Jeremiah Allen Esq. dec'd to petition of James Allen of Boston Esq., Jeremiah Allen ready to exhibit of accounts, dated Boston 10 Jan 1745/6 [Suffolk Co. Probate, new series v. 22, p. 67-69; Docket #7702].
5) On 27 Jan last & 9 Feb following will & codicil of Jeremiah Allen late of Boston Esq. dec'd proved, administrators to his sons James Allen & Jeremiah Allen executors, dated Boston 9 Feb 1741[/2?]; will of Jeremiah Allen of Boston Esq., to Mary his wife £250 per year as widow but if remarried £100 per year, to my son-in-law Mr John Wheelwright £50, to my dau.-in-law Mrs Martha Allen £1000, to my dau.-in-law Mrs Elizabeth Allen £350, to my grandson Jeremiah Wheelwright £2500 when 21, if dec'd & no lawfull issue legacy void, remainder to my two sons James Allen & Jeremiah Allen, 2/3 to James eldest & 1/3 to Jeremiah, sons James & Jeremiah Allen executors, dated 26 Jun 1736, will presented to executors, witnesses Boston 22 Jan 1741[/2?], codicil to my wife Mary Allen, dated 24 Oct 1736, witness 9 Feb 1741[/2?] & witness 10 Feb 1741[/2?] [Suffolk Co. Probate, v. 35, p. 602-605; Docket #7702].
6) Will of James Allen late of Boston clerk dec'd proved, administrators to his sons John Allen & Jeremiah Allen executors, dated Boston 18 Oct 1710; will of James Allen of Boston clerk, in 74th year of his age, to my dau. Hannah Danforth wife of Reved Mr Samuel Danforth of Taunton land in Boston which I had of her mother, mention of her dau. Eliz. Danforth, to my son John Allen land devised to me by my Uncle Penn dec'd, to my son Jeremiah Allen, to Jeremiah & his dau. Mary Allen his granddau., mentions my dau-in-law Mary Allen wife of my said son Jeremiah, 2 sons John & Jeremiah Allen executors, my 3 children Hannah Danforth, John Allen & Jeremiah Allen, dated 12 Mar 1705/6 [Suffolk Co. Probate, v. 17, p. 100-103; Docket #3272].
One other item. The Jeremiah Allen was a son of James Allen who came from England to Massachusetts in 1662:
Discussion of Rev. James Allen of Boston, Ejected Minister & Fellow of New College, Oxford, came to NE 1662 or 1663, installed teacher at First Church 9 Dec 1668, d. 22 Sep 1710 age 78 [b. abt. 1632], son was minister in England and d. Northampton [NEHGR, v. 3, p. 119].
In records of the First Church in Roxbury of Rev. Samuel Danforth, under 1662, mention of "This sumer several came to vs from England. mr. James Allin, minister" [NEHGR, v. 34, p. 88]
Jeremiah Allen of James & Eliza. Born, Mar 29, 1673 [Boston].
Jeremiah Allen of James Allen our Teacher baptised, 30: 1mo: 1673 [Boston].
Baptism of Jeremiah Allen son of our teacher Mr. James Allen, 13:2mo:1673, his mother buried 5:2mo:1673 [First Church, Boston].
There are a lot is records on James and his family. See Rev. James Allen