UrsprungFrom Old Norse maðra, from Proto-Germanic *madarǭ.
Formermadra(indefinite, nominative, singular) · madras(genitive, indefinite, singular) · madran(definite, nominative, singular) · madrans(definite, genitive, singular) · madror(indefinite, nominative, plural) · madrors(genitive, indefinite, plural) · madrorna(definite, nominative, plural) · madrornas(definite, genitive, plural)
Källa: Wiktionary