I did several searches. The only satisfying result was what I found on names.org. It says that Denil is actually Indian; it derives from Sanskrit, which is a more ancient language, basis of all the Indo-European languages. For some it means "Gods' messenger", for others it means "Creator" and is another name of the Hindu god
Shiva. Alwayson names.org I found, among the related names,
Daniel & family.
You must never be fearful about what you are doing when it is right. ~
Marie Curie
My name list: behindthename.com/pnl/223545