Where does “Ruben” come from?

Ruben (Old Portuguese) comes from Latin Ruben, from Hebrew רְאוּבֵן, from Hebrew בֵּן — son.

Ancestry of “Ruben”, step by step

Step	Language	Word	Meaning
1	Latin	Ruben	—
2	Hebrew	רְאוּבֵן	—
3	Hebrew	בֵּן	son

Ruben — Etymology, Origin & Word History | Etymology Explorer