Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
trans-nōmĭno, āvi, 1, v. a., to name over again, change the name of a person or thing to something else (post-Aug.): Septembrem mensem et Octobrem ex appellation ibus suis Germanicum Domitianumque transnominavit, Suet. Dom. 13 fin.; so id. Gram. 18: qui prior et Christum suum in homines annuntiaret et Jesum transnominaret, Tert. adv. Marc. 4, 39 init.