Historical documents rarely mentions the individual names of the Zamorins of Calicut. Mana Vikrama, Mana Veda and Vira Raya were the only names given to male members in the royal family, the Zamorin always being known as Manavikrama. Mana Veda might be a corruption of the Old Malayalam title "Mana Viyata".[1] Portuguese historian Diogo de Couto was the first to attempt the construction of chronological scheme.[78]