I keep searching around for what it means, since I want to use the name as one of my characters. But the closest I've ever gotten to a translation was Mina Ashido's name being a pun on meaning Acid. And even then I feel like I'm missing alternate, more viable meanings depending on the spelling and their english meanings. Help?
I'm not even sure if you know about kanji, but there are more than one way to write the surname "Ashido" with Japanese characters. Ashido is not a common surname, and therefore it's not possible to give the "meaning" unless we know the kanji version of it.
Here are two possibilities with the meaning of each kanji.
- 足土 Ashido: 足 = foot, 土 = soil
- 芦戸 Adhido: 芦 = reed (plant), 戸 = door
That said, generally speaking, the meaning of a surname is usually not worth thinking about. It's something we unconditionally inherit from out parents, and almost no one can explain when and how their surname was coined.
How about 吾獅童 for "Ashido"?
If you allow a long vowel sound of "o" like "oh" or "ō", "ashido" could be written as 吾獅童, which means "I'm a child of a lion", where 吾 means I, 獅 means a lion and 童 means a child or a little boy.
By the way Nakamura Shidō II (二代目 中村 獅童 Nidaime Nakamura Shidō), is a famous Japanese kabuki and film actor.