Words that come from Proto-Italic is

99 words across 25 languages descend from Proto-Italic is — including anteal, antea, is, quest, eccum istum, chest, iste, este.

See the etymology of is itself →

Latin (21)

Romanian (12)

Italian (10)

Vulgar Latin (9)

Spanish (6)

Catalan (4)

Romagnol (3)

Ladin (3)

Mirandese (3)

Emilian (3)

Old Portuguese (3)

Portuguese (3)

English (2)

French (2)

Sicilian (2)

Neapolitan (2)

Marrucinian (2)

Romansch (2)

Galician (1)

Fala (1)

Old Occitan (1)

Istriot (1)

Dalmatian (1)

Friulian (1)

Old French (1)