Gaia Gaja breezed into town yesterday to put on a tasting with her importer Armit at the Soho Hotel, celebrating the 150th year since her great, great grandfather Giovanni Gaja, founded what has become today one of Italy’s most famous wines, if not the most famous. Lady Gaja? Hardly. Gaia Gaja is unusual not just for her rather extraordinary name. Some of the world’s leading families have produced great figures that bestrode the 20th century world stage like giants, among them Miguel Torres, Piero Antinori, Robert Mondavi and one of the greatest egos of them all, Angelo Gaja.