Brook \b-rook\ as a boy's name (also used as girl's name Brook), is a variant of Brooks (Old English, Old German), Holbrook (Old English) and Westbrook (Old English), and the meaning of Brook is "water, small stream; stream near the hollow; western stream".

The baby name Brook sounds like Brock, Brok and Brooke. Other similar baby names are Crook, Brose, Breck, Brion, Brick, Brik, Brocke, Broc, Brod, Brody, Bronko, Bron, Brookie, Brookes, Brown, Krock, Crock and Crooke.