Answer
Indeed, Geta, Septimius Severus, and Caracalla shared the imperial throne at various points in history. Septimius Severus, the founder of the Severan dynasty, reigned as Roman emperor from 193 to 211 AD. His eldest son, Caracalla, ruled alongside him as co-emperor from 198 AD until Severus' death. Upon his father's passing, Caracalla became the sole emperor until his assassination in 217 AD.