Incubus demon sleeps with human female giving birth to first born child

An Incubus (pl.  Incubi) is a male demon in human form in folklore that seeks to have sexual intercourse with sleeping women; the corresponding spirit in female form is called a succubus. Parallels exist in many cultures.^[1]

In European mythology and literature, a cambion (/ˈkæmbiən/) is the offspring produced from a human–demon sexual union, typically involving an incubus or a succubus. In the word's earliest known uses, it was interchangeable with changeling.