The verbs be and go have the nice peculiarity that their various forms (be/was and go/went) come from originally distinct verbs. Are there other such verbs?
I guess not. As stated here:
(The link for "suppletive" will point you to the "suppletion" wiki page, where there are examples, also for other languages. Suppletion also applies to adjectives, nouns, etc.)
This is another page for the English suppletive verbs, which are only two.