The name Kayo reached its peak in 2009, with 20 registrations (ranked #4843). It had been quietly building for over half a century before that, first appearing in records in 1926. Since the peak, the name has eased to well outside the top 1,000 (around #8377) today, averaging about 10 new babies per year. Kayo's usage has held roughly steady recently. Across all years on record, approximately 273 American babies have carried this name.