The owners of vineyards sometimes exhibit personalities every bit as faceted as their wines. Katherine Crofton Cebrian Pringle was such a person. This figure of 20th-century San Francisco society once lived in Madrid, but the Spanish Civil War forced her to return to California, where she entertained lavishly—with the help of appropriate staff. “I don’t even butter my bread,” she once said. “I consider that cooking.” She did, however, make wine: After reviving Napa Valley’s Schramsberg winery, she sold it to i…