<Table> <Tr> <Th_colspan="2"> Lau </Th> </Tr> <Tr> <Th> Pronunciation </Th> <Td> / ˈlaʊ / </Td> </Tr> <Tr> <Th_colspan="2"> Origin </Th> </Tr> <Tr> <Th> Region of origin </Th> <Td> Chinese - speaking countries Korean - speaking countries Vietnamese - speaking countries </Td> </Tr> <Tr> <Th> Word / Name </Th> <Td> William, Old Germanic </Td> </Tr> <Tr> <Th_colspan="2"> Other names </Th> </Tr> <Tr> <Th> Variant (s) </Th> <Td> Liu (surname) </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Lau </Th> </Tr>

Where does the last name lau come from
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