Per popcornbird's request, I will try and further explain what "Jinns" are. Arabic is my native language, but I will post URLs so that you may also have references :)
The word "jinn" (this is how it is pronounced in Arabic) translates to genii (Arabic To English Dictionary ). If you are interested in seeing for yourself, select the Arabic To English option and type in hg[hk. These letters correspond to the Arabic letters that spell out Jinn.
Genii is plural for genious and also mean jinni. According to Merriam-Webster's Dictionary , jinni is one of a class of spirits that according to Muslim demonology inhabit the earth, assume various forms, and exercise supernatural power. Demons is a term used to describe an evil supernatural being; a devil. However, Muslims do not believe all Jinnis are evil.
God created the angels from light, created the jinni from the pure flame of fire, and Adam from clay. Satan is a jinni and is the father of all the jinni-kind as Adam is a human and is the father of all the human kind.
Does this help explain it?