Djinni

Jinn (Arabic: الجن‎‎, al-jinn), also romanized as djinn or anglicized as genies (with the more broad meaning of demons), are supernatural creatures in early Arabian and later Islamic mythology and theology. An individual member of the jinn is known as a jinni, djinni, or genie (الجني, al-jinnī). They are mentioned frequently in the Quran (the 72nd sura is titled Sūrat al-Jinn) and other Islamic texts. The Quran says that the jinn were created from a smokeless and "scorching fire", but are also physical in nature, being able to interact in a tactile manner with people and objects and likewise be acted upon. The jinn, humans, and angels make up the three known sapient creations of God. Like human beings, the jinn can be good, evil, or neutrally benevolent and hence have free will like humans. The shaytan jinn are akin to demons in Christian tradition and are classified into three groups:

The earliest evidence of the word, can be found in Persian, for the singular Jinni is the Avestic "Jaini", a wicked (female) spirit. Jaini were among various creatures believe among pre-Zoroastrian peoples of Persia.

Jinn is an Arabic collective noun deriving from the Semitic root JNN (Arabic: جَنّ / جُنّ‎‎, jann), whose primary meaning is "to hide". Some authors interpret the word to mean, literally, "beings that are concealed from the senses".Cognates include the Arabic majnūn ("possessed", or generally "insane"), jannah ("garden"), and janīn ("embryo").Jinn is properly treated as a plural, with the singular being jinni.

...
Wikipedia