I have ancetors who were Chews, living in India at least between 1790 and 1870. Has anyone else come across this line?

My CHEWs

John Chew (b about 1766 in Calcutta, India) and Isabella
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John George Chew (b 1809 in Calcutta) and Rosalie Sophia Briant
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|Laura Matilda Chew (b 1853 in Calcutta) and George Henry Postance
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|George Henry Postance (b 1880 in Calcutta) and Caroline De Verdon Edwards
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|Francis Henry Postance (b 1908 in Wallasey, UK) and Mary Margaret Jones
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|David Llewelyn Postance (b 1941 in Newtown, Wales)
ME!

Thanks
David