Margarita Ivonne "Wonny" Geuer Draeger (born 3 May 1966) is a former Spanish basketball player who represented Spain from 1985 to 1993 and winning a gold medal at the 1993 European Championship.

[1] Geuer started playing at 14, in Irlandesas de Bamí and Medicina Oximper in her hometown of Sevilla.

At 17, she started her senior career at Real Canoe NC, where she won three consecutive Liga Femenina titles, from 1984 to 1986.

She spent the next two years in Lugo at CD Xuncas, where she was runner-up in the 1987 league and in the 1987 and 1988 Copa de la Reina.

She spent the next four years at the BEX Banco Exterior team, where the most talented Spanish players were recruited in order to compete in the 1992 Summer Olympics held in Barcelona.