人祖 is read as じんそ (jinso) and means progenitor.
じんそ
jinso
じんえんどうそせつ
monkey-ancestry theory
にんずう
the number of people
じんみん
the people
じんけん
human rights
じんるい
mankind
にんぎょう
doll
じんしゅ
race (of people)
じんかく
personality
ひとごみ
crowd of people
にんげんせい
humanity
にんじょう
human nature
にんそう
physiognomy