Of the community or people
A rare feminine elaboration of the Greek root 'demos', meaning 'the people' or 'community'. While it shares a phonetic similarity to the word 'demon', its etymological roots are tied to the same origin as 'democracy'. It has occasionally been used as a creative variation of Monica.
Less common today
Demonica isn't in the latest US Top 1000. It last peaked at #3,272 in 1990.
US births per 5-year period, 1990βpresent (SSA data).