Proximity

google

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late 15th century: from French proximité, from Latin proximitas, from proximus ‘nearest’.

wiktionary

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proxim(ate) +‎  -ity, from Middle French proximité, from Latin proximitās, proximitāt-, from  proximus. 

etymonline

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proximity (n.)

"nearness in place, time, or relation," late 15c., proxymyte [Caxton], from French proximité "nearness" (14c.), from Latin proximitatem (nominative proximitas) "nearness, vicinity," from proximus "nearest, next; most direct; adjoining," figuratively "latest, most recent; next, following; most faithful," superlative of prope "near" (see propinquity).