The 'euphemisms' posted by Virginia Tam may be in his family's usage, but most are incorrectly attributed. Two are:

Lickspittle- English, and is defined in Grose's Dictionary of the Vulgar Tongue (1790s) as a tale-bearer, or a parasite.

Nittygritty- originally Black English, meaning fundamental or gritty. Now widespread. Nothing to do with slaves.

Fanny- (Bottom) is widespread in usage.
A music hall song, 1830s, I've got a little fanny, referred to the vulva. A WW1 army initiation game was "Bat the fanny."

Cherry- in print for virginity from c. 1790.