RON - How many sons did Alma the 1st have?

JOEL - Alma the elder (#1) had at least two sons, one which was also named Alma, known as "Alma the younger".

"Now the sons of Mosiah were numbered among the unbelievers; one of the sons of Alma was numbered among them, he being called Alma, after his father; (Mosiah 27:8)

The phrase "one of the sons of Alma" indicates that there were at least two or more sons, but none others beside Alma the Younger are mentioned in the scriptures.
Alma the younger was probably the eldest son, since it was to him whom his father passed on the records. (Mosiah 28:20)
Alma the younger had at least three sons named Corianton and Helaman and Shiblon.(Mosiah 31:7)