Likely a modern variation of Amber or Cambria
Kambre is a contemporary American invention, likely created by blending the 'K' prefix with the name Amber or as a phonetic variation of Cambria. As a modern coinage, it does not have a singular ancient etymology but carries the stylistic weight of its phonetic components.
Less common today
Kambre isn't in the latest US Top 1000. It last peaked at #9,465 in 2011.
US births per 5-year period, 1990βpresent (SSA data).