同姓 どうせい同名 どうめいではありませんでした
dōseidōmeidewārimasendeshita

Noun
Desu Copula
no-Adjective

The polite, past negative form of 同姓同名

1. Was not of the same family name and same given name.; Was not a namesake.

Past/Perfective
Negative
Polite
Formal Register