Rhythm, flow, or beat
Kaydince is a modern phonetic spelling of the English word 'cadence', which refers to the rhythmic flow of sounds in language or music. It emerged as part of the trend of using musical terms as names, often modified with creative spellings like the 'Kay-' prefix and '-ince' suffix.
Less common today
Kaydince isn't in the latest US Top 1000. It last peaked at #3,709 in 2008.
US births per 5-year period, 1990βpresent (SSA data).