Living up to its name, the Washington International School has installed a truly international man as its second headmaster. He's a German-born educator who attended gymnasium (as high school is called) in his native land, won three degrees from two American universities, taught at two prestigious prep schools, then at an international school in Hamburg.

He came to Washington from Cairo where, since 1980, he was superintendent and headmaster of the American College, in reality a school encompassing kindergarten through 12th grade.

Gunther Brandt, 44, who studied at Stanford and Princeton universities and has a doctorate in history, was officially installed in a ceremony Wednesday at the Washington International School's Tregaron campus on Macomb Street NW. D.C. Mayor Marion Barry was among those who spoke at the ceremony, praising the school for its role in adding to Washington's diversity.

The school has 530 students, ranging in age from 3 to 18, representing 80 nations. About one-third are American, of whom there are a high proportion of blacks, including what a school spokeswoman called a significant number of talented inner-city youths on scholarships. All students are bilingual: classes are conducted in English and either French or Spanish.

Brandt lives in McLean with his wife and three sons. He succeeded Dorothy Goodman, the school's founding headmistress.