From a Germanic surname and personal name root meaning 'rich' or 'powerful.'
Riker is a surname-turned-given-name of Germanic and Dutch origin, derived from the Old High German 'rîchari' or the Dutch 'rijker,' both pointing toward meanings of 'rich,' 'powerful,' or 'mighty ruler.' As a family name it appears in early Dutch and German colonial records in the Americas — the Riker family was among the early Dutch settlers of New Amsterdam, and Rikers Island in New York, now infamous as a detention facility, takes its name from this Dutch colonial family.
This unexpected historical thread — from powerful Dutch settlers to one of America's most notorious correctional institutions — gives the surname an unusual double life in American historical memory. As a first name, Riker owes its modern cultural presence overwhelmingly to one figure: Commander William Thomas Riker of the starship Enterprise, the charismatic First Officer played by Jonathan Frakes in 'Star Trek: The Next Generation,' which ran from 1987 to 1994. Riker — confident, principled, occasionally roguish, devoted to his captain and crew — became one of the franchise's most beloved characters, and parents who grew up with the show have steadily adopted his surname as a given name for sons.
The name carries a confident, masculine energy, its hard consonants and punchy two-syllable structure giving it a strong sonic profile. In the twenty-first century it has gained steady traction in American naming data, appealing to parents who want something uncommon but grounded in familiar cultural reference.