Giscard, of French origin, is derived from the Germanic elements 'gisil' meaning 'pledge', and '-hard' meaning 'strong, brave'. It was popularized by French President Valéry Giscard d'Estaing, who served from 1974 to 1981. This name, although rare, adds a unique touch when used.
"Giscard was quite popular as a baby name in three separate years throughout the 1980s, with peaks in 1981 and again in 1984 and 1987."