Hottentottade,
en, Hottentottersang

L. Meyer: Fremmedordbog

Hottentot,
a native of the Cape of Good Hope. (Du.) The word is traced in Wedgwood, who shews that the Dutch gave the natices this name in ridicule of their peculiar speech, which sounded to them like stuttering. He cites the word from Schouten (1653). En is Dutch for `and;' hence hot en tot = `hot' and `tot;' where these words indicate stammering. Cf. hateren, to sammer, in Hexham's Du. Dict., 1647; tateren, to tattle (Sewel).

Skeat: English Etymological Dictionary