Wiktionary
second cousin once removed
n. 1 Son or daughter of one’s second cousin. 2 Second cousin of one’s father or mother.
Usage examples of "second cousin once removed".
It would be altogether too likely that the stranger would say, 'You can't be, because she is a short, fat woman in her fifties, and my second cousin once removed on my mother's side.
Molly and I are cousins by marriage and Arthur's something like my second cousin once removed.
Although Bilbo often referred to Frodo as his 'favourite nephew', he was in fact his first cousin once removed (through his mother), and also his second cousin once removed (through his father).
Do you suppose the old lady would let a vulgar policeman arrest her great-grandnephew, or her second cousin once removed?