Geertsom, Jan van
- Susan Bain
(fl Rotterdam, mid-17th century). Dutch musician and publisher. He may be related to Géry Ghersem, maître de chapelle to Philip II in Spain at the beginning of the 17th century. Archives at Rotterdam show that Geertsom rented a house there from 1665 to 1669; his publications of 1656–7 give his address as ‘Rotterdam, in de Meulesteegh’. Four music collections, published between 1656 and 1661, are known. The composers represented are all Italian, including many active in Rome: Abbatini, Carissimi, Stefano Fabri (ii), Gratiani, Marcorelli (= Marco Aurelli) and Tarditi. The volume Scelta di motetti, for example, contains (with one exception) motets by composers who held positions at various churches in Rome. Geertsom appears to have had business connections with the firm of Phalèse family in Antwerp. Not only does his music type bear a distinct resemblance to that of Phalèse, but also ‘Mr Jan Gersem’ is listed in a ...