Origin or birth
A modern phonetic spelling of the Greek word 'genesis', which denotes the beginning or creation of something. It is most famously associated with the first book of the Hebrew Bible and the Christian Old Testament.
Less common today
Jennesis isn't in the latest US Top 1000. It last peaked at #8,194 in 2012.
US births per 5-year period, 1990βpresent (SSA data).