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Family name Siallagan (Siallagan ) , globally, is a common cognomen. The cognomen Siallagan is habitual in South-eastern Asia, particularly Indonesia, where it is quite a rare surname, Singapore, where it is a rare surname, and Malaysia, where it is a very rare surname. In absolute terms, it is the most numerous in Indonesia, Malaysia, and Australia.
VARIANT | COUNTRY |
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Siallagan | Australia, Indonesia, Singapore, Malaysia, France |