ETYM Hebrew kerűb.
1. A sweet innocent baby.
2. An angel of the second order whose gift is knowledge; usually portrayed as a winged child.
Type of angel in Christian belief, usually depicted as a young child with wings. Cherubim form the second order of angels.

ETYM Hebrew serâphim, pl.
An angel of the first order; usually portrayed as the winged head of a child.
In Christian and Judaic belief, an angel of the highest order. They are mentioned in the book of Isaiah in the Old Testament.