Douglas Harper's Etymology Dictionary
monstrous bird, rational and ancient, in Persian mythology, 1786, from Persian simurgh, from Pahlavi sin "eagle" + murgh "bird." Compare Avestan saeno merego "eagle," Sanskrit syenah "eagle," Armenian cin "kite." Probably identical with the roc (q.v.).
Wikipedia
Simurgh (; Persian: سیمرغ sɪmorγ), also spelled simorgh, simurg, simoorg or simourv, is an Iranian benevolent, mythical flying creature. It is sometimes equated with other mythological birds such as a "Griffin" or "Phoenix" (which it shares several similarities with), Persian Homā . The figure can be found in all periods of Greater Iranian art and literature and is also evident in the iconography of Georgia, medieval Armenia, the Byzantine empire, and other regions that were within the realm of Persian cultural influence. The name simurgh derives from Middle Persian Pahlavi sēnmurw (and earlier sēnmuruγ), also attested in Middle Persian Pāzand as sīna-mrū. The Middle Persian term derives in turn from Avestan mərəγō Saēnō "the bird Saēna", originally a raptor, likely an eagle, falcon, or sparrowhawk, as can be deduced from the etymological cognate Sanskrit śyenaḥ ("raptor, eagle, bird of prey") that also appears as a divine figure. Saēna is also a personal name, which is root of the name. The word was also borrowed into Armenian as siramarg ‘peacock’.
The most prestigious award given by Fajr International Film Festival, Iran's major annual film festival, is called the Crystal Simorgh, after the mythical creature.
Usage examples of "simurgh".
She testified that she and her friends Mela Merwoman and Ida Human had been sent by the Simurgh to rescue the stranded trio, and had done so, with the help of a Seed of Thyme and some negotiation.
Good Magician says the Demon Earth needs to be rescued, and the Simurgh says we need the Swell Foop, and to find it we need the Six Rings, and only the zombies know where they are.
The Simurgh had good magic, because these Bisks worked in Xanth, Mundania, and the dream realm.