he has the same surname as the one who married sayaka . 清花の野郎は結婚してたらしくて あの男と同じ名字。
a ban on sharing a same post between the families having a same surname . 同姓同官名の禁止
there is isshikida as the same surname but with a different pronunciation . 異音同姓に一色田がある。
as the same surname with the different sound (pronounced as watarida ), there is 渡田 . 異音同姓(わたりだ)渡田がある。
now , as long as it is not used when the branch sect shares the same surname , " head of the school " is almost an equivalent saying to " originator of the sect " . 現在では、同姓の分家との関係で用いられないかぎり、ほぼ「家元」の言いかえである。