Non-lemma pages are kept as minimal as possible. Etymological information is consolidated on the lemma page. This is the standard practice for cases where a lemma has multiple distinct origins. Compare koelen, durven.
Are these not weak verbs? There is no form to memorize, they are regularly derived. This is in contrast to the case with the forms I mentioned.
Strong verbs are also regularly derived.
Even so, here's some suppletive verbs for your comparing: go, be, zijn.