Gustaf Magnus Elgenstierna was a Swedish genealogist and postal official. Elgenstierna is most well known for correcting the work of Gabriel Anrep which was published as Den introducerade svenska adelns ättartavlor and his work on other Swedish genealogy publications.
- Occupation
- Traditional genealogist, postal official
- Citizenship
- Sweden
- Born
- August 26, 1871
- Died
- March 21, 1948