heyfengur
nafnorð karlkyn
Beyging
eintalafleirtala
án greinismeð greinián greinismeð greini
nf.heyfengurheyfengurinnnf.heyfengirheyfengirnir
þf.heyfengheyfenginnþf.heyfengiheyfengina
þgf.heyfengheyfengnumþgf.heyfengjumheyfengjunum
ef.heyfengs / heyfengjarheyfengsins / heyfengjarinsef.heyfengjaheyfengjanna