When Sarah Morgan was christened on 7 November 1746, in Whitchurch, Glamorgan, Wales, United Kingdom, her father, William Morgan, was 49 and her mother, Sarah Thomas, was 40. She married William Jenkin on 15 June 1773, in Eglwysilan, Glamorgan, Wales, United Kingdom.
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.