The name Sybella is a girl's name of Greek origin meaning "seer, oracle". Sybella and is often added to user-created lists like Obscure Female Names and discussed in our forums with posts like "Themed Families..".
From the experts:
The lovely Sybella is being nudged into the spotlight by two influences: the original Sybil (the most popular spelling) or Sibyl, name of the beauteous youngest sister of television's period megahit Downton Abbey, and Top Ten name Isabella. Biggest downside: There are an awful lot of girls with names that are variations of Bella around these days. But Sybella at least makes a distinctive member of the genre.