My family name Joncas origin

About my first ancestor that came to North America and my family name Joncas origin. The possible origine of the Last Name Joncas in North America.: In France it was JUNQUA (Dans la langue latine, juncus signifie jonc. Pierre Joncas ou Junqua de son vivant, n’est pas un vulgaire jonc de marais mais un Gascon ...