American Family Name Origins:
Gilsenan
Frequency: (121)
(number of times this surname appears in a sample database of 88.7 million names, representing one third of the 1997 US population)
Irish: reduced form of MacGils(h)enan, an Anglicized form of Gaelic Mac Giolla Seanáin ‘son of the servant or devotee of St. Senan’.
GIVEN NAMES: Irish 8%. Brendan, Colm.
See the Key to the Dictionary or consult the General Introduction for further explanation.
