Nobody knows where he was born or where he came from - as a small toddler, he was found at the doorstep of an orphanage in Melbourne, and that's the earliest memory he possesses. He only possessed his first name and the clothes on his body. Taken in by the caring staff, he grew up among the other orphans with no worry of not knowing his original parents. As such, his middle and last names were given to him by the orphanage, and his birth date is referring to the day that he was found.
He was never adopted, but he soon displayed magical capabilities. He was sent to Whitlam Bilby and Tallygarunga as the years progressed - instead of returning to the orphanage during breaks, he just lived in these institutions despite being under the legal guardianship of the government. He took to the situation like fish to water, as he was all too used to having no place to call his own.
Given his delicate situation he was always very well protected by those whom looked after him. It made him feel like his true parents were the staff from school, no matter how many they were; Tallygarunga was his family, and it helped giving him a sense of stability. When his parseltongue ability surfaced, however, in fear of it being traced to someone he didn't know, he decided not to reveal it so not to be uprooted from those he did deem his family.
As he graduated, he went on to VMU to study magizoology. Not being too ready to leave the area he's grown so fond of, however, he decided to take on a second degree as his current one is about to end - herbology. Could it be he does struggle with loneliness on an unconscious level?