From Christie's:
Artistic dynasties were not unusual in Victorian England, but few attained the distinction of the Hayllars, where five members of the family exhibited at the Royal Academy towards the end of the century. In addition to producing a son who was an engraver, James produced four remarkable daughters, each of whom he taught.
James Hayllar was born in Chichester in 1829, and after overcoming family opposition enrolled at Cary's Art School in 1842. Francis Cary was a respected historical painter who later took over Sass's Academy in Bloomsbury. He is now principally remembered as tutor to Rossetti and Millais.
On completing his studies, Hayllar made a tour of the continent, where he encountered Leighton in Rome in in 1851.
His likeness can be seen in Leighton's first great canvas, Cimabue's Madonna carried through the streets of Florence, which was purchased by Queen Victoria, and is now in the Royal Collection, though on loan to the National Gallery.