Kaden is the son of Seamus Conor McDonough, a member of the Romany traveling community and was born in Tipperary, Ireland. He is the youngest of four brothers and two sisters, Conor Dylan (1975), Shane Cian (1979), Darragh Liam (1981), Shannon Roisin (1983), Sinead Orla (1985), Ciaran Niall (1986). Kaden also had another brother who died at the age of two, Kaden Seamus I (1987-1989). He grew up on a camp site in Tipperary, where he was first introduced to the sport of Boxing. His family eventually moved to Boston, Massachusets but Kaden thought his Boxing would be better served in Great Britain and moved back to Hackney in London. He never met his Mother as she died during his child birth, but she is known as a respected person within the Traveling community.
McDonough never attended school, but was educated as part of the Boston ABC education program and worked for his fathers Bricklaying company for many years in between training. His determination has always been noted as a huge asset to his abilities and former Boxing coach from Boston, Frank Murphy, said "If the boy [McDonough] can calm down, he will have a great future ahead of him in anything! He is a natural athlete and will be able to turn his hand at anything.
Gypsey Throwdown (Two jabs with the right hand followed by a quick left hook, usually knocking the opponent out rather than pin)