Putto Today, in Italian, "putto" means either toddler winged angel or, rarely, toddler boy. It may have been derived from the same Indo-European root as the Sanskrit word "putra" (meaning "boy child", as opposed to "son"), Avestan "puθra"-, Old Persian "puça"-, Pahlavi (Middle Persian) "pus" and "pusar", all meaning "son", and the New Persian "pesar" "boy, son". Putti, in the ancient classical world of art, were winged infants that were believed to influence human lives. In Renaissance art, the form of the putto was derived in various ways including the Greek Eros or Roman Amor/Cupid, the god of love and companion
Plural form of words ending in -us "omnis", and "ignoramus" is a verb form, 'we do not know'. "Syllabus" is a Late Latin (16th c.) word, derived from a misreading of the Greek "sittybos" "table of contents"; since it is not a classical word, it does not have a classical plural. The English plural of "virus" is "viruses". In most speaking communities, this is non-controversial and speakers would not attempt to use the non-standard plural in -"i". However, in computer enthusiast circles in the late 20th century and early 21st, the non-standard "viri" form (sometimes even "virii") was well-attested, generally in the context of computer viruses. "Viri"