responder

to answer, to reply; to talk back, to answer back (to respond defiantly and inappropriately); to respond, to react (to someone else's actions); to answer for, to be responsible for, vouch for (with por); to react, to respond (to a treatment, with a)

“responde al nombre de” — his/her name is

Inherited from Old Spanish responder, inherited from Latin respondēre (likely via Late Latin respondĕre). The original past participle was respuso or repuso in Old Spanish. The expected diphthongization of stressed Latin /ŏ/ is found in Asturian responder (that is, respuendo) and sporadically in Old Spanish as well.