THE HAGUE, Netherlands (AP) — A pair of paintings by Dutch Golden Age master Frans Hals that possibly depict his own children are returning to the Netherlands after more than a century overseas in the hands of private owners. “Boy Playing the Violin” and “Girl Singing,” were bought Monday at auction for $7.8 million by the Frans Hals Museum and the Mauritshuis museum, with financial support from the Dutch government and a group of foundations. Painted around 1628, the works are seen as especially interesting because, according to the museums, Hals may have used his own children as models.