There were 4 villains to take the name Syonide. The 1st was an enemy of the golden age Wonder Woman. The 2nd was a hit-man for hire who worked for Tobias Whale and who clashed with Black Lightning. The 3rd also worked for Whale and was Halo of the Outsiders's nemesis. The 4th was a woman named Nikki who was part of Lady Eve's Strike Force Kobra, fought Looker and Eradicator of the Outsiders, and was her teammate Fauna Foust's girlfriend.

Syonide

There were 4 villains to take the name Syonide. The 1st was an enemy of the golden age Wonder Woman. The 2nd was a hit-man for hire who worked for Tobias Whale and who clashed with Black Lightning. The 3rd also worked for Whale and was Halo of the Outsiders's nemesis. The 4th was a woman named Nikki who was part of Lady Eve's Strike Force Kobra, fought Looker and Eradicator of the Outsiders, and was her teammate Fauna Foust's girlfriend.

All data from the awesome folks at Marvel.