Delepierre was twice married, first to Emily, the sister of Robert Napier, 1st Baron Napier of Magdala, by whom he had two daughters.
His own works include, besides the catalogues and bibliographies already mentioned, translations from Flemish of Hendrik Conscience's Sketches of Flemish Life, 1846, from German of part of Brunnhofer's Life of Giordano Bruno, Scheffel's Die Schweden in Rippoldsau, and Eckstein's Eternal Laws of Morality; and a memoir of Joseph Octave Delepierre, Belgian consul in London, whose daughter he married.
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