3 occurrences in 3 dictionaries

Reference: Deuel

Fausets

Nu 1:14; 7:42; in Nu 3:14 Reuel, the Hebrew letter Resh (?) closely resembling the Hebrew letter Daleth (?).

Hastings

Father of Eliasaph, prince of Gad (Nu 1:14; 7:42,47; 10:20) = Reuel, Nu 2:14 (perhaps the original name).

Morish

Deu'el

Father of Eliasaph, 'prince' of Gad. Nu 1:14; 7:42,47; 10:20. In Nu 2:14 he is called REUEL. This is plainly an instance where the letter ? (D) has been mistaken for the letter ?(R).