Etymology
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caviar (n.)

also caviare, "roe of certain large fish, salted and served as food," 1550s, from French caviar (16c.), from Italian caviaro (modern caviale) or Turkish khaviar, from Persian khaviyar, from khaya "egg" (from Middle Persian khayak "egg," from Old Iranian *qvyaka-, diminutive of *avya-, from PIE *ōwyo‑, *ōyyo‑ "egg," which is perhaps a derivative of the root *awi- "bird") + dar "bearing." The Russian name is ikra.

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*awi- 

Proto-Indo-European root meaning "bird." It also might be the source of *wyo, *yyo, Proto-Indo-European words for "egg."

It forms all or part of: auspex; auspices; auspicious; avian; aviary; aviation; aviator; avicide; aviculture; aviform; caviar; cockney; egg (n.); ocarina; oo-; oocyte; oolite; oology; osprey; ostrich; oval; ovary; ovate (adj.); oviform; oviparous; ovoviviparous; ovoid; ovulate; ovulation; ovule; ovum.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit vih, Avestan vish, Latin avis "bird;" Greek aietos "eagle;" Old Church Slavonic aja, Russian jajco, Breton ui, Welsh wy, Greek ōon, Latin ovum, Old Norse egg, Old High German ei, Gothic ada all meaning "egg."

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