Gregorius Radvenis or Gregorius Heidrikis (November 11, 1903 in Parausiai estate, Vilkaviškis county – December 26, 1989 in Los Angeles, California) was a squadron commander in the Lithuanian Air Force.
He achieved the rank of captain in 1936.
He became a qualified glider pilot pioneering and promoting gliding in Lithuania and holding the first gliding records in Lithuania.