family names - 26 readings for "Niu"

This JapanTimes article describes the logic, variations, and patterns among surnames in Japan these days.

The extreme example is the 2-character family name with kanji for 'ship' and 'alive' with 26 ways to read it, from Nioi to Mibu, according to the article.

https://www.japantimes.co.jp/life/2018/08/13/bilingual/japanese-surnames-among-usual-suspects-youre-bound-find-curveballs/