Because that book sold in huge numbers, the name 'Yukimura' became more common, and later 'Yukimura' was adopted even in the history book of the Matsushiro Domain, who were descendants of his older brother Nobuyuki.
その本が爆発的に売れたため、「幸村」とすることのほうが一般的となり、後には兄・信之の子孫である松代藩の史書にまで「幸村」が採用された。