What started as an 'obviously' jokey list of baby names developed into a family feud when this sister named her penis enlargement surgery florida daughter after a nasty infection.

Taking to the popular Reddit forum Am I The Ahole, a 20-year-old biology student thought to be from the US told how he gave his pregnant nurse sister a list of nasty medical terms that could double as girls' names.

Medications, infections and unpleasant animals featured on the list and he included obvious entries like 'Viagra' and 'Hernia' to evade any ambiguity.

But now the relationship has ruptured, with the brother telling his 27-year-old sibling that her final choice is 'unacceptable'.

And the mother-to-be argues her brother is wildly overstepping his boundaries by believing he has a say in her child's name.