Guttormur ORMSSON (1345 - 26 May 1381)
Halldór ORMSSON (ABT. 1510 - )
Halldór ORMSSON ( - )
Halli ORMSSON (ABT. 1055 - )
Jón ORMSSON (ABT. 1604 - 30 Dec 1685)
Kodrán ORMSSON (ABT. 1050 - )
Loftur 'íslendingur' ORMSSON (ABT. 1434 - 1479)
Olafur ORMSSON ( - )
Páll ORMSSON ( - )
Sigmundur ORMSSON (ABT. 1140 - 1198)
_orleikur 'hinn audgi' ORMSSON (ABT. 1075 - 1154)
_órdur ORMSSON ( - )
ORMUR (ABT. 1045 - )
ORMUR (ABT. 975 - )
Guttormur ÖRNÓLFSSON ( - )
Jón ÖRNÓLFSSON (ABT. 1185 - 1222)
_órólfur 'mostrarskegg' ÖRNÓLFSSON (ABT. 842 - 918)
OSBURGA ( - 846)
Guttiere OSOREZ ( - )