Origin of the " Ha " last name?

Question: Origin of the " Ha " last name!?

My grandparents says it was originated from China!?!?!?!?!?

But I'm Korean!. And my last name Ha is so rare for koreans!. Its so rare and uncommon!.

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Best Answer - Chosen by Asker:

I found the same as the other person,
Ha Name Meaning and History
Vietnamese (Hà): unexplained!.
Korean: there are two Ha clans, each with a unique Chinese character!. The founding ancestor of the larger Ha clan was named Ha Kong-jin and settled in the Chinju area around ad 1010!. Most of the modern descendants of Ha Kong-jin live in the Kyongsang and Cholla provinces!. The founding ancestor of the smaller of the two clans was named Ha Hum, and he settled in the Taegu area after emigrating from Song China some time in the early part of the twelfth century!. Most of the modern descendants of Ha Hum still live in the Taegu area!.
Chinese : variant of Xia!.
English: unexplained!.
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Vietnamese (Hà): unexplained!.
Korean: there are two Ha clans, each with a unique Chinese character!. The founding ancestor of the larger Ha clan was named Ha Kong-jin and settled in the Chinju area around ad 1010!. Most of the modern descendants of Ha Kong-jin live in the Kyongsang and Cholla provinces!. The founding ancestor of the smaller of the two clans was named Ha Hum, and he settled in the Taegu area after emigrating from Song China some time in the early part of the twelfth century!. Most of the modern descendants of Ha Hum still live in the Taegu area!.
Chinese : variant of Xia!.
English: unexplained!.
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