From the town of the keys or wharf
Kayton is likely a variant of the English surname Keaton or Cayton. It typically refers to a 'settlement of keys' or a 'wharf,' derived from Old English or Old Norse elements. As a given name, it is a modern adaptation of these traditional English place-names.
Less common today
Kayton isn't in the latest US Top 1000. It last peaked at #6,610 in 2016.
US births per 5-year period, 1990βpresent (SSA data).