When William Fitzgerald was born in 1778, in Orange, New York, United States, his father, Jeremiah Fitzgerald, was 28 and his mother, Anna Margaret Mingus, was 28. He died on 22 August 1823, in Philadelphia Monthly Meeting, Philadelphia, Philadelphia, Pennsylvania, United States, at the age of 45, and was buried in Philadelphia, Philadelphia, Pennsylvania, United States.
Some characteristic forenames: Irish Brendan, Eamon, Liam, Aidan, Bridgid, Caitlin, Donal, Fitz, Fitzgerald, Ciaran, Colum, Dermot.
Irish: from Anglo-Norman French fi(t)z ‘son’ (see Fitz ) + the personal name Gerald (see Gerald ), ‘son of Gerald’. This is a very common Anglo-Norman name in Ireland, where it has been Gaelicized as Mac Gearailt. Irish bearers of the name claim descent from Gerald Fitzwalter de Windsor, constable of Pembroke Castle in the early 12th century, whose grandson Raymond (or Redmond) ‘le Gros’ FitzGerald (died after 1185) led the invasion of Ireland on behalf of Strongbow in 1170. A branch of the family held the title Knight of Glin from at least 1299–2011.