When ever I found meaning of the name Tirso it would say -Greek origin, means "crowned with vine leaves-
But then after doing a bit of research I found the Latin word thyrsus -i m. [the stalk of a plant; a wand , as carried by
Bacchus and his attendants].
So, I guess the name Tirso comes from the Latin word thyrsus, which indeed means "crowned with vine leaves".
Pls, correct me if I'm wrong :o)