Unknown or modern creation
Tkai is a contemporary name with no established etymological history in major linguistic traditions. It is likely a modern American invention, possibly influenced by names like Kai or Ty, or a creative phonetic variation. Because it lacks a documented root, its meaning is subjective to the parents who choose it.
Less common today
Tkai isn't in the latest US Top 1000. It last peaked at #3,793 in 2002.
US births per 5-year period, 1990βpresent (SSA data).