Kanji: 藤 Reading: ふじ [fuji] Meaning: wisteria (a flower)
Kanji:ヶ Reading: が [ga] Meaning: So I’m not entirely sure if this is a kanji as such. I think it’s an abbreviation of a kanji. Anyway, used in a name like this it takes on the meaning of a possessive marker, like the modern の. So it gives his name, 藤ヶ谷, an overall meaning of something like “valley of wisteria”.
Kanji:谷 Reading: や [ya] Meaning: valley
Kanji:太 Reading: たい [tai] Meaning: plump, thick (apparently he has said that the 太 in his name is from 太陽 [taiyou], meaning 'sun' ^^)