But of course I know! Roxaan, wadaaddo, shaxar, fuquburaale or fiqiburaale, mingis, nasro, booramaha, xayaad(southern somalia only) etc.
First of all, it's Rooxaan not Ruxaan.
Rooxaan or Wadaaddo are the spirits of awliyo(saints). People nowadays associate rooxaan with jinns.
In order not to anger the rooxaan, Somalis used to cook casumaad and place the food in front of their aqal.
Rooxaanta or wadaaddada love camels! So it's even better if you offer them some camels.

The act of inviting and martisooring the rooxaan to your house is called "Saar".
Someone who falls sick due to roxaanta is suffering from "mingis". The way to cure mingiska is through saar-tumid aka a saar dance, the purpose of the dance is to reach jilbo(trance) and that's when the spirits leave the body.
Saar tumid is usually performed by women but it's a dying practice now. Most women who used to practice Saar moved onto Sitaad ama Sitaat which is dikr. Most of them distance themselves from saar, rooxan etc.
Baarcadde and batar are saar dances. There's also this saar dance performed by Somali men from Southern Somalia.
The popular belief is that Saar came to Somalis through Ethiopia(Harar) whilst Sufis are argue that Sh. Jaylaani introduced it to them.
Funny story on rooxaanta, watch the first 5 mins.
Faal is not a spirit lol. It just means astrology.
Faaliye: One who reads the stars or predicts the future.
Fal: Magic.