Gillis is a masculine given name. Notable people with the name are as follows:
- Gillis Ahlberg (1892âÂÂ1930), Swedish rower
- Gillis Backereel (1572âÂÂ1662), Flemish painter
- Gillis Berthout (1175/80âÂÂ1241), Dutch nobleman
- Gillis Bildt (1820âÂÂ1894), Swedish politician
- Gillis Claeissens (1526âÂÂ1605), Flemish painter
- Gillis Coignet (c. 1542 â 1599), Flemish painter
- Gillis II Coignet (1586âÂÂ1641), Flemish painter
- Gillis van Coninxloo (1544âÂÂ1607), Flemish painter
- Gillis d'Hondecoeter ((c. 1575-1580âÂÂ1638), Dutch painter
- Gillis Hooftman (1521âÂÂ1581), Dutch merchant
- Gillis Grafström (1893âÂÂ1938), Swedish figure skater
- Gillis Lundgren (1929âÂÂ2016), Swedish furniture designer
- Gillis Mostaert (1528âÂÂ1598), Flemish painter
- Gillis Neyts (1618 or 1623âÂÂ1678), Flemish painter
- Gillis Schagen (1616âÂÂ1668), Dutch painter
- Gillis van Tilborgh (c. 1625 â c. 1678), Flemish painter
- Gillis Valckenier (1623âÂÂ1680), Dutch politician
- Gillis Wilson (born 1977), American football player