411 REFERENCE · Wiktionary
O'
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
Appendix:Variations of "o"
English
Etymology
From en ga Ó.
Unrelated to en o' of.
Prefix
Descendant of; used to form Irish patronymic surnames.
O'Reilly
See also
en Fitz-
en Mac
en Mc-