The original namesake of 
The original namesake of modern Cologne, she was killed at Antium after opposing the marriage of Poppaea Sabina and favoring her younger son Britannicus. She first married Gnaeus Domitius Ahenobarbus, while her third husband was Emperor Claudius, whom she may have fed poisoned mushrooms in her plot to put her son on the throne. For 10 points—name this sister of Caligula and mother and victim of Nero.
The original namesake of modern Cologne, she was killed at Antium after opposing the marriage of Poppaea Sabina and favoring her younger son Britannicus.
{Agrippina} the Younger