One of Tadakatsu's uncles was Ujiaki UEMURA, famous for his heroic acts among the Tokugawa vassals, and another of his uncles was Tadazane HONDA, a master of spears.
忠勝の叔父は徳川家中では武勇もって有名な植村氏明であり、また同じく叔父に槍の名手の本多忠真を持つ。