John Diederich Lankenau ( 1817 -- 1901 ) was a German - American businessman and philanthropist and the namesake of Lankenau Medical Center .
A German - American businessman and philanthropist is an executor of financier Francis Martin Drexel .
John Diederich Lankenau ( 1817 -- 1901 ) was a German - American businessman and philanthropist , an executor of financier Francis Martin Drexel , and the namesake of Lankenau Medical Center .