Is there a general term used in English for a sole last child in a family, born to older parents, long after its siblings were born? It seems to be a common phenomenon in large Victorian families, and you'd think there would be a name for it.
Google has thrown up terms in other languages - Afrikaans laat lammetjie ('late lamb'), Norwegian attpåklatt ('afterthought') - and, I'm guessing recent, American English slang caboose baby, but has anyone come across any other term?