Rejean is of French-Canadian origin, derived from the Germanic elements 'ric' meaning powerful and 'jan' meaning gift or grace. It was popular among Acadians who were exiled from Nova Scotia in the 18th century and settled throughout Canada. Today, Rejean remains a distinctively Canadian given name, uncommon elsewhere but with a strong presence in French-speaking provinces like Quebec.
Rejean had 5 births in 1971 and 13 in 1980, making a total of 18 births over the two years.