VLVL/Blood & Vato, short-form

[Mark Wright AIA]

Howdy

I'm sure I've missed something but I'll ask anyway:

I know what the nickname "Blood" means, I think. (Short for "Blood
Brother"... indicates membership in an honorary extended family...
something like that?)

But what does "Vato" mean? What is it short for?

(He asks in all innocence...)
Mark

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