love child

noun

Etymology: From love + child.

1. A child born as a result of a romantic liaison between parents not married to one another; an illegitimate child.

   “Nobody ever came to see her, nobody spoke of her, nobody cared about her. Mr Brass had said once, that he believed she was a ‘love-child’ (which means anything but a child of love).”

   “Love child, never meant to be / Love child, born in poverty”

2. Something that includes influences of multiple predecessors.

   “The grunge genre was the love child of punk and metal.”