Leonard Gyllenhaal was born 3 December 1752 in Ribbingsberg, Västergötland, Sweden to Hans Reinhold Gyllenhaal (1724-1796) and Anna Catharina Wahlfelt (1723-1799) and died 13 May 1840 Höberg, Sweden of unspecified causes. He married Anna Hård af Torestorp (1763-1845) 5 January 1788 in Synnerby.
Swedish military officer and entomologist. Knight of the Royal Order of Vasa.
Children
| Name | Birth | Death | Joined with |
| Eleonora Gyllenhaal (1789-1790) | |||
| Hans Ulrik Gyllenhaal (1790-1790) | |||
| Fredrik Leonard Gyllenhaal (1802-1873) | 3 November 1802 Höberg, Sweden | 30 June 1873 Fränsta, Sweden | Christina Lovisa Westling (1811-1846) |
Residences
Footnotes (including sources)
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