Town near a cliff
Derived from Old English elements meaning a settlement or town situated near a steep cliff or slope. It is an elaboration of the more common surname-turned-first-name Clifton.
Less common today
Cliffton isn't in the latest US Top 1000. It last peaked at #2,505 in 1990.
Professional basketball player
US births per 5-year period, 1990βpresent (SSA data).