Parents
- Alexandre Arthur Lefèbvre de Ladonchamps (1815 - 1875), avocat
- Sidonie Pacotte (1828 - 1886)
Family
- Married on April 27, 1881 in Châlons-en-Champagne, with Marie Louise Philomène de Ponsort (1856 - 1931), issuing
Marguerite Marie ( - 1882)
Henry Joseph (1883 - 1946)- Geneviève (1892 - 1960)
- Magdeleine (1896 - 1946)