Wouldn't Geoff Shackelford's "The Golden Age of Golf Design" provide some branches for this topic? He lists:
The National School of Design - Macdonald, Raynor, Banks, Emmet
The Philadelphia School of Design - Crump, Wilson, Tillinghast, Thomas, Bell, Flynn
The Ross School of Design - Ross
The MacKenzie School of Design - Hunter, Hollins, Jones(Bobby), MacKenzie, Behr
The Monterrey School of Design - Morse, Neville, Grant, Egan
Other Schools - Maxwell, Langford, Strong, Thompson
Additionally there is a "Golden Age of Golf Design Family Tree" which ties all of these individuals to Old Tom Morris
Dave