Old English surname from 'cyninges leah' meaning 'king's meadow'; a place-based aristocratic name.
Kingsley began life as an English surname and place-name, built from Old English elements usually understood as "king" and "woodland clearing" or "meadow." In that sense it belongs to a long tradition of names that started on the map before moving into family lines and then into the nursery.
It carries a faintly aristocratic sound because of that royal first syllable, but its roots are also pastoral: a king's clearing in the landscape, not just a throne room in the imagination. The name gained literary and cultural weight through figures such as the Victorian novelist and clergyman Charles Kingsley and, later, the writer Kingsley Amis. For many younger audiences it also has a pop-culture echo in Kingsley Shacklebolt from the Harry Potter series, which helped make the name feel modern and vivid rather than merely old-fashioned.
That is part of Kingsley's story: it has moved from surname to given name, from masculine tradition into occasional unisex use, and from something stately to something stylish. Today it often reads as polished, tailored, and quietly bold, a name that sounds both inherited and newly chosen.