Which German toy breed's name is commonly translated as 'monkey terrier'?

The German toy breed whose name is commonly translated as “monkey terrier” is the Affenpinscher.

Its name comes from the German word Affe, meaning “ape” or “monkey,” combined with Pinscher, referring to its pinscher type. The translation describes its expressive, monkey-like face, not its formal place in dog classification.

Affenpinschers were developed as small ratters, working in homes, kitchens, stables, and granaries. Their rough coats and alert temperaments suited them to catching rodents, while their compact size later helped them become companion dogs.

A common mix-up is calling the Affenpinscher a terrier because of its wiry coat and mouser history. It is actually classified among pinschers and schnauzers. The breed also influenced the development of the Brussels Griffon and Miniature Schnauzer, and the American Kennel Club recognized it in 1935.