Lewis Short
ad-neptis | atn- (noun F) : ()
* A daughter of the abnepos or of the abneptis, i. e. a granddaughter of a great-grandchild, i. e. a fourth granddaughter, antith. to the atavia, Dig. 38, 10, 1, ยง 7.
Charlton T. Lewis, Charles Short, A Latin Dictionary