Louis Rosenhead CBE (1 January 1906 – 10 November 1984) was a British mathematician noted for his work on fluid mechanics, and was head of the Department of Applied Mathematics at Liverpool University from 1933 to 1973.
They were married in Leeds in 1905, adopting the Anglicized versions of their names: Abraham and Ellen Rosenhead.
Rosenhead graduated with first class honours in 1926, and continuing, eventually to attain a Ph.D. in 1928, studying under Brodetsky.
Rosenhead spent time there along with Sydney Goldstein and H. B. Squire, all working on theoretical fluid mechanics.
[1] During World War II, Rosenhead was superintendent of ballistics at the Projectile Development Establishment and collected a team of mathematicians to work on rocket weapons.