He will more than likely crow more often and louder as a maturing cockerel than he will as a full fledged adult, so if he's borderline tolerable as a 'teen', you shouldn't have noise issues when he's fully grown. Just don't want you thinking OMG, he's too loud, when he's not fully developed his...
See those downward pointing spear-shaped feathers over his back and thighs? Those are called 'saddle feathers' and are only found on roosters. Perhaps you could change his name to Diamond (similar to Diane, and hopefully close enough that his little chicken ears won't be offended).