H 21

H 21 may refer to:

  • The code name of the spy Mata Hari in the German intelligence
  • The multi-purpose aircraft Junkers H 21
  • Transport Helicopter Piasecki H -21
  • The British submarine HMS H21
  • A subgroup of haplogroup H in human genetics
  • Disambiguation
Piasecki H-21 Haplogroup H (mtDNA)
288598
de