(Drenthe) Attested as Haantje (Het) in 1874. Derived from the diminutive form of haan(“rooster”). The toponym might refer to a former inn. According to a local explanation, the village sprang up around a decayed oak with a rooster-like shape. See also Dutch Low Saxon't Haantie.
(Noord-Brabant) (This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)