I compiled this genealogy of doctoral advisors using the data at the Mathematical Genealogy Project, for “Feldmania”, a scientific meeting honoring the 65th birthday of my doctoral advisor, Prof. Marcus W. Feldman.
I've included some tangents from the line of descent — the lines to Perron and Frobenius, since their theory is fundamental to mathematical population genetics, and to Poincare, just because he did pioneering work on chaos.
Please also see this memorial to Marc's doctoral advisor, Sam Karlin.