▁ ▁References ▁ ▁Category : Year ▁of ▁birth ▁missing ▁( l iving ▁people ) ▁Category : L iving ▁people ▁Category : Univers ity ▁of ▁Michigan ▁al umn i <0x0A> </s> ▁Hel vet ius ▁is ▁the ▁Roman ▁name ▁for ▁a ▁member ▁of ▁the ▁Gall ic ▁tribe ▁known ▁as ▁the ▁Hel vet ii , ▁or ▁an ▁inhab it ant ▁of ▁their ▁territory , ▁Hel vet ia ▁( now ▁known ▁as ▁Switzerland ). ▁ ▁It ▁may ▁also ▁refer ▁to : ▁ ▁a ▁Roman ▁cogn omen , ▁typically ▁bor ne ▁by ▁those ▁of ▁Hel vet ian ▁origin . ▁ ▁Hel vid ius , ▁sometimes ▁written ▁Hel vet ius , ▁the ▁author ▁of ▁a ▁work ▁written ▁prior ▁to ▁ 3 8 3 ▁against ▁the ▁belief ▁in ▁the ▁perpet ual ▁vir gin ity ▁of ▁Mary . ▁ ▁Claude ▁Ad rien ▁Hel v ét ius ▁( 1 7 1 5 – 1 7 7 1 ), ▁a ▁French ▁phil os opher ▁and ▁litt ér ateur . ▁ ▁Anne - C atherine ▁de ▁L ign iv ille , ▁Madame ▁Hel v ét ius ▁( 1 7 2 2 – 1 8 0 0 ), ▁the ▁phil os opher ' s ▁wife , ▁who ▁maintained ▁a ▁ren owned ▁sal on ▁in ▁France ▁in ▁the ▁eigh teenth ▁century . ▁ ▁James ▁Francis ▁Hel vet ius ▁Hob ler ▁( 1 7 6 4 - 1 8 4 4 ). ▁ ▁Johann ▁Friedrich ▁Schwe itzer , ▁also ▁known ▁as ▁John ▁Frederick ▁Hel vet ius ▁( 1 6 2 5 – 1 7 0 9 ),