父ふ系けい

noun, noun which may take the genitive case particle 'no'

paternal line; father's side of the family

Refers to lineage or relatives on the father's side. Often used in genealogical or family contexts, contrasting with 母系 (maternal line).

See also: 母系

• 彼かれは父ふ系けいの家か系けいを調しらべている。

  He is researching his paternal lineage.