Lewis & Short

ĭtĭnĕror, āri, 1, v. n. [iter], = ὁδοιπορέω, to travel, Gloss. Lab.
Hence, part. as subst.: ĭtĭnĕrans, antis, a traveller (late Lat.), Ambros. in Psa. 1, § 25: Salv. de Gub. Dei, 1, p. 33.