Delong Family History
Delong Name Meaning
French: habitational name with fused preposition de ‘from’ denoting someone from a place called Long of which there are examples in Cher Dordogne and Somme. Americanized form of Dutch and Flemish De Lange 1 and of its Flemish cognate De Langhe which is also found in France (Nord and Pas-de-Calais).
Source: Dictionary of American Family Names 2nd edition, 2022