Hubbard and Geoffrey de Guingand served jointly as the school's first headmasters.
Mullan was the first person to serve jointly as transportation secretary and chief executive of the Department of Transportation.
Homan currently serves jointly as the school's president, dean of the medical school and provost.
His mother Theodora and Theoktistos jointly served as his regents.
Giraud and de Gaulle served jointly as co-presidents of the committee.
It originally had a dual function, serving jointly as a schoolroom in its early days.
Here he served jointly with Karl Marx on General Council for a number of years.
After Balanchine's death in 1983, he and Peter Martins served jointly until 1990 as the company's artistic directors.
Two churches jointly serving cathedrals of a diocese are each known as "co-cathedrals".
It jointly served the present countries of Uganda, Tanzania and Kenya.