Family name origins & meanings
- French : topographic name for someone who lived on marshy land, from a diminutive of Old French jaille ‘marsh’, ‘mud’, now a regional term found mainly in western France. It may also perhaps have been a nickname with the sense ‘muddy’; in the Jura the word is applied to a cow with dark patches on its flanks. In the U.S., Jaillet is concentrated in MA.