Sorush is connected with Sraosha in Avesta.org’s list of Zoroastrian names.
Names and religious terminology
The list groups Sarosh, Sarush and Sorush, links them to Avestan Sraosha, and gives hearkening and obedience as meanings. It also records the name’s association with the seventeenth day of the month.
William W. Malandra’s Encyclopaedia Iranica entry describes Sraoša as a major Zoroastrian yazata, gives the Middle Persian form Srōš, and notes the figure’s place in Iranian Islam as the angel Surōš.
Sources
Avesta.org’s Zoroastrian names list and William W. Malandra,“Sraoša,” Encyclopaedia Iranica, opening discussion.