I have attached the North American Families record for Hezekiah son of Gershom in the sources: it lists 9 children while possible Ruth had 15 children it is not likely unless a few were twins.
The following children are not listed (I am thinking these 4 need to be removed but will leave that up to you.
James
Abram
Jeremiah different dates than the other Jeremiah
Justus
Jabez
Ruth I did combine the two Ruths the year of births were off by a year.
The other note sons: Jeremiah and Hezekiah
I attached their records also under sources
These records show Jeremiah married Abigail Smith and Hezekiah married Mary Briggs
No FAG for Jeremiah but there is one for Hezekiah but that FAG shows he married Abigail Smith but she has different years that what is posted as Jeremiah's Abigail Smith.
So either Hezekiah married twice or there is the incorrect Hezekiah posted here.
The other note: The son Hezekiah was listed as his mothers husband and his siblings father when pulled over from a GEDCOM file. It took quite a bit of doing to get that all straight.
Kat