Hester Whelan

According to https://en.wikipedia.org/wiki/Frederick_Calvert,_6th_Baron_Baltimore

Calvert had two children by Hester Whelan:[1]

Henry Harford (1758–1835), the last Lord Proprietor of Maryland.
Frances Mary Harford (1759–1822)[16][17] who married William Frederick Wyndham (1763–1828) on 21 July 1784. Their son George Wyndham became the 4th Earl of Egremont.[citation needed]

In 1765, he fathered twin daughters with Elizabeth Dawson of Lincolnshire, Sophia and Elizabeth Hales.[17]

He had another daughter, Charlotte Hope, born in Hamburg in 1770, with Elizabeth Hope of Münster, Germany.[1][17]