Namesakes
Roman and Byzantine Emperors:
1 emperor
Emperor Flavius Claudius Julianus (a.k.a. Julianus) 360-363 
Saints:
3 saints
Saint Julian (a.k.a. Julianus) ?-c. 310
Saint Julian Sabbas the Elder (a.k.a. Julianus) ?-377
Saint Julian (a.k.a. Julianus) ?-430