I Have 2 Great-grand Mothers

I am a Cantonese-Chinese . I born in Sabah , live there for 22 years . Although I am a Cantonese , but I speak Hakka at home and I have a Hakka surname (my surname suppose to be Tang instead of Tien) .I have 2 great-grand mothers , my great-grand father married both of them before Japanese invaded Sabah . the first one is a pure Sabahan bumiputra , she is the first wife and they fell in love