My last name is Roxas, I wonder why the kingdom hearts creator choose the name Roxas,

the name Roxas is refer from Filipino name, there are many Roxas name in some Filipino people, like well known names of Phillippine President Manuel A. Roxas and Filipino politician Mar Roxas.

and there's a also name Roxas places in the philippines, like Roxas in Zambouanga Del Norte, Roxas city, Capiz, Roxas, Isabela, Roxas, Oriental Mindoro and Roxas, Palawan. see!