The usual English name for the male counterpart of a quinceañera celebration is quinceañero. It refers to a boy or young man celebrating his fifteenth birthday in a related tradition.
The word is the masculine Spanish form corresponding to quinceañera. Spanish nouns and descriptive forms often change endings to reflect grammatical gender, producing quinceañero for a male celebrant and quinceañera for a female celebrant.
Male celebrations may be called quinceañero celebrations, but practices are not identical everywhere. Some communities use the broader quinceañera tradition for girls while adapting selected elements for boys; others use different names or do not observe the custom.
A chambelán is not a synonym for quinceañero. A chambelán is generally a male member of the celebrant’s court or escort group, so he may participate in the event without being its honoree.