Sigborgarson
nafnorð karlkyn Móðurnafn
Fallbeygingar
Eintala
nefnifall
Sigborgarson
þolfall
Sigborgarson
þágufall
Sigborgarsyni
eignarfall
Sigborgarsonar
Fleirtala
nefnifall
Sigborgarsynir
þolfall
Sigborgarsyni
þágufall
Sigborgarsonum
eignarfall
Sigborgarsona