The sornā or sornāy (Persian: سُرنای، سُرنا, also سورنای، سورنا surnā, surnāy and also Zurna) is an ancient Iranian woodwind instrument.
The word was most likely borrowed from an unknown Indo-European cognate of Luwian 𒍪𒌨𒉌 (zurni, “horn”), Sanskrit शृङ्ग (ṡṛṅga, “horn”), Latin cornū, and English horn, probably ultimately from Proto-Indo-European *ḱerh₂. A folk etymology explains that the word sorna is a Pahlavi derivative of sūrnāy (literally "strong flute"), which is a compand of 'sūr' (strong) and 'nāy' (flute).[1] According to such folk etymology, it was called "strong flute" due to its double-reed-construction rather than usual nāy (Persian: نای), which was made of a single tube of cane, while another folk etymology believes that that the first part of word of sorna, is from sūr again from Pahlavi and New-Persian, meaning the "banquet, meal and feast", thus the "banquet-flute".[1]

"Sorna", being a cognate of "Horn", can simply mean horn. This is a result of the Centum-Satem isogloss, and later Grimm's Law. Even in Persian there is another wind instrument whose name appears to be a cognate of both "Sorna" and "Horn", called "Karnā" (کرنای/کرنا); this may stem from a re-borrowing from another language.
https://en.wikipedia.org/wiki/Sorna