Shirabe

ゆう

Na-adj family or surname given name or forename, gender not specified
English jmdict
1
formal form of na-adjective archaic superb;outstanding
English jmnedict
1

まさる

given name or forename, gender not specified
English jmnedict
1
Masaru

尤なるゆうなる

pre-noun adjectival (rentaishi)
English jmdict
1
pre-noun adjectival (rentaishi) superb;outstanding