Helgeirsson
nafnorð karlkyn Föðurnafn
Fallbeygingar
Eintala
nefnifall
Helgeirsson
þolfall
Helgeirsson
þágufall
Helgeirssyni
eignarfall
Helgeirssonar
Fleirtala
nefnifall
Helgeirssynir
þolfall
Helgeirssyni
þágufall
Helgeirssonum
eignarfall
Helgeirssona