The first name of the Dragon known as Theo Paphitis is Theodoros.
Theo Paphitis was born Theodoros Paphitis in Cyprus and became a British retail entrepreneur. He is particularly associated with the Ryman stationery chain and with the restructuring and expansion of other retail businesses.
Paphitis joined the original investor line-up of the British Dragon's Den and appeared in the programme's early years. His public professional name, Theo, is a shortened form of Theodoros and is the name most viewers know from television and business coverage.
The answer is not Theodore, although that is a common English name with a similar sound. The spelling and form Theodoros reflect Paphitis's Greek-Cypriot background. This question concerns his given name, not the names of his retail companies or his role as a Dragon.