Helmuthsson
nafnorð karlkyn Föðurnafn
Fallbeygingar
Eintala
nefnifall
Helmuthsson
þolfall
Helmuthsson
þágufall
Helmuthssyni
eignarfall
Helmuthssonar
Fleirtala
nefnifall
Helmuthssynir
þolfall
Helmuthssyni
þágufall
Helmuthssonum
eignarfall
Helmuthssona