His children, two sons and three daughters, were all baptised at birth and he and his wife were baptised in 1832. They were parents to the painters Felix (1833–1917), their second son, and Serena Anna Moscheles (1830–1902), their second daughter and wife of Georg Rosen. Rosen was an orientalist like his brother of Friedrich August Rosen, another friend of Mendelssohn, like Moscheles. His granddaughter Jelka Rosen, also a painter, married the composer Frederick Delius. Another granddaughter, Marie-Thérèse, married Henry Fielding Dickens, the son of author Charles Dickens. Moscheles travelled extensively in Europe as a pianist and conductor, eventually settling in London (1825–1846) where he became co-director of the Royal Philharmonic Society in 1832. He never disavowed his Jewish origins and frequently took his family to visit his relatives in Prague, all of whom had retained their Jewish allegiances.