Where does “rightuous” come from?

rightuous (English) comes from Middle English rightwise, from Old English rihtwīs — righteous, just, right, justifiable; righteous,...

Ancestry of “rightuous”, step by step

Step	Language	Word	Meaning
1	Middle English	rightwise	upright, righteous; rightly
2	Old English	rihtwīs	righteous, just, right, justifiable; righteous,...

rightuous — Etymology, Origin & Word History | Etymology Explorer