Necronomicon (aka Necro) was born in 6 ABY on the planet Corulag. He grew up with his father Trigo, his mother Falwase, and his younger brother Oris. Shortly after his birth his family moved to Delaya to avoid the high taxes in Corulag in 7 ABY.
Not much is known about Necronomicon's childhood up until the age of 15 due to an unknown event that caused him to lose all memory prior to age 15. What is known is he was discovered force sensitive when he was 8 years old and was trained as a grey jedi by an unknown instructor. His parents were abusive and he lacked anything in common with them except for genetics. The kids that he grew up with treated him like he was a leper due to his force sensitivity and how it was still frowned upon at that time in history.
As he grew older he stopped his training and began attempting to train himself. He became focused on the New Republic and how the New Jedi Order was forming. He became disgusted with the government and felt that it was being ran entirely inefficiently. The Jedi started to have an overpowering rule over the government as well which just drove the nail of hate for the government even further and started his initial rage at the Jedi and their power. Over time he slowly became passive towards the Jedi and the Republic due to feeling he could do nothing about it. He decided to live an average life and even stopped honing his force skills. He became an adult and after having an extremely rough past with his parents and feeling that every day was a struggle to simply survive he decided to move to Felucia to go to school and learn about Droid Programming. After being overwhelmed with the amount of math required for his major and just a rough life in Felucia in general he decided to temporarily move back to Delaya.
After seeing that things at home hadn't changed he decided to visit his life long friend Nathan on Hapes who had moved there with his sister a year prior. He was really enjoying his time there and when he came back to Delaya, he decided he was going to move to Hapes and continue school there with a different major. He ended up moving about 4 months after his visit and went to school there originally for music business, while on Hapes he ended up meeting a girl named Nova and they ended up becoming engaged, shortly after becoming engaged Nova became pregnant, but due to numerous other problems including medical, the baby did not make it. Nova and Necronomicon ended up becoming very torn by the entire incident, it caused Necronomicon to decide to continue with what he was doing and finish his Computer Engineering degree. He and Nova still remained together and after Necronomicon finished school Nova broke things off. Necronomicon was devastated and decided to just go for what he's always wanted to do and be a part of something bigger than himself and ended up joining the Dark Jedi Brotherhood in 27 ABY.
Slow to start in the Brotherhood he didn't make much progress for his first year being in the Brotherhood, but after getting to know numerous members of the Brotherhood better like Atra and Teu, he decided to stop his hiatus and actually follow through with being a part of something bigger.