Meaning of name Dainin

The names of some famous persons by the name Dainin (or its variants) are:

Jikai Dainin Katagiri , born on 19 January, a famous religious character. Jikai Dainin Katagiri 's background: Born in 1928, he was a Soto Zen roshi and the founding abbot of Minnesota Zen Meditation Center, where he served from 1972 until his death. He played a key role in helping bring Zen Buddhism from Japan to the United States during its formative years.