Rósborgarson
nafnorð karlkyn Móðurnafn
Fallbeygingar
Eintala
nefnifall
Rósborgarson
þolfall
Rósborgarson
þágufall
Rósborgarsyni
eignarfall
Rósborgarsonar
Fleirtala
nefnifall
Rósborgarsynir
þolfall
Rósborgarsyni
þágufall
Rósborgarsonum
eignarfall
Rósborgarsona