LADONNE, Justin Arthur. Bordeaux 20.5.1832 — Bassens, Gironde 30.8.1889. French self-taught Sanskritist in Bordeaux, where he gave a “cours libre de sanskrit” at Faculté de Lettres in 1886–89.Son of Erasme L. (d. 1833) and Marthe Durant. He was a landowner and belonged to local scholarly societies. Married 1864 Marie Louise Laure Balguerie, seven sons and five daughters.

Sources: Briefly mentioned in Bongard-Levin, Vigasin & Lardinois 2002; information kindly offered in 2020 by Maxime Ravel referring to geneanet.org. and to the obituary of his son in https://gallica.bnf.fr/ark:/12148/bpt6k57442474/f29.item.r=%22Ladonne%22.