
Following his father`s accession to the throne, Hostilian received the treatment of an imperial prince, but was always kept in the shade of his brother Herennius, who enjoyed the privileges of being older and heir. In the beginning of 251, Decius elevated his son Herennius to co-emperor and Hostilian succeeded him in the title of princeps iuventu....
Found on
http://en.wikipedia.org/wiki/Hostilian

Roman emperor in 251.
Found on
http://www.britannica.com/eb/a-z/h/72
No exact match found.