Platt Platt Name Meaning. English: habitational name from Platt or Platt Bridge in Lancashire, named in Middle English with Old French plat 'flat', 'thin' (see Platte), in the dialect sense 'plank bridge'. English: topographic name from Middle English plat 'plot of land', 'piece of ground' (Old English plætt).
Meaning: Ground without slope
Origin: French