noun, noun which may take the genitive case particle 'no'
male lineage; patrilineal
Refers to descent or succession through the male line. Often used in legal, historical, or genealogical contexts.
この家系は男系で続いてきた。
This family line has continued through the male line.
男系の子孫のみが王位を継承できる。
Only male-line descendants can succeed to the throne.