Also known as the Moselle Brook, originally a tributary of the River Lea, but now flowing into Pymmes Brook, another tributary of the Lea. The Wikipedia page is [1], and that on the French river is [2] The name derives from 'Mosse-Hill' in Hornsey, the high ground containing one of the river's sources, and bears no direct etymological relationship to the major continental Moselle River.[1] The hill area also gave its name to the district of Muswell Hill and for a time the river was known as the Moswell.