 In 1855, he married Carolina (Lina) Charlotta in de Betou (1823–1872).They were the parents of painter Edma Frølich (1859–1958).Carl Nielsen composed the "Kantate til Lorenz Frølich-Festen" (CNW 103) for Frølich's eightieth birthday, celebrated in Koncertpalæet, Copenhagen on 30 November 1900.