When Thomas Morgan was born about 1722, in Fife, Scotland, United Kingdom, his father, William Morgan, was 48 and his mother, Eupham Mathey, was 44. He married Agnes Ramsay on 24 August 1753. They were the parents of at least 4 sons and 2 daughters.
Welsh (especially Glamorgan): from the medieval Welsh personal name Morgan, Morgant (Old Welsh Morcant, of uncertain etymology).
Irish: importation of the Welsh surname (see 1 above), to which has been assimilated more than one Gaelic surname, notably Ó Muireagáin (see Merrigan ).
Scottish: probably from a Gaelic personal name cognate with Welsh Morcant.