Helmeted head or misshapen head
Kennadee is a modern phonetic spelling of the Irish surname Kennedy. While the etymological meaning refers to a 'helmeted head,' the name is primarily chosen today for its upbeat sound and association with the prominent American political family.
Less common today
Kennadee isn't in the latest US Top 1000. It last peaked at #3,576 in 2008.
US births per 5-year period, 1990βpresent (SSA data).