About the Stephenson surname
The surname Stephenson is associated with a patronymic formation. The -son ending traditionally indicates descent, with the sense “son of.”. The name therefore belongs to a tradition in which an ancestor's given name gradually became a hereditary surname. Different families could independently adopt a surname formed from the same given name.
Pronunciation:
Stè-fan-son/stɛfɑ̃sɔ̃/