Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
tĭtŭlo, āvi, ātum, 1, v. a. [titulus], to give a title to, to call, name, entitle (postclass.): magos quoque Samaritanorum appellatione titulavit, Tert. adv. Jud. 9 med.; id. Anim. 13; Carm. Judic. Dom. 2; Mart. Cap. 1, § 41.