As the wife of Masanari was the older sister of Sadakatsu MATSUDAIRA, the lord of the Kuwana Domain, Masanari's son, Masatoki Genemon HATTORI, also worked for the Kuwana Domain.
また、服部正就の妻は桑名藩主松平定勝の姉であり、その子・服部源右衛門正辰も桑名藩に仕えている。