There was a James Badham christened at Dixton (Monmouth)1755, and others christened later in Monmouth, there were always Badhams in Monmouth when I grew up there, there probably still are.

BADHAM, James Chr 1755 MONMOUTH Father - Thomas BADHAM, mother Elizabeth

HARRIET JANE BADHAM -
Gender: Female Christening: 11 MAR 1864 Monmouth, Monmouth, England

GEORGE BADHAM -
Gender: Male Christening: 12 NOV 1856 Monmouth, Monmouth, England

CAROLINE BADHAM -
Gender: Female Christening: 06 OCT 1858 Monmouth, Monmouth, England

FRED