Hibernian
Concise Oxford English Dictionary © 2008 Oxford University Press:
Hibernian /hʌɪˈbəːnɪən/
▶adjective of or concerning Ireland (now chiefly used in names). ▶noun a native of Ireland (now chiefly used in names).
– origin from L. Hibernia (alt. of Iverna), from Gk I(w)ernē, of Celtic origin.
'Hibernian' also found in these Oxford entries:

