Rubuta ci gaba don wannan sakin layi - Louis, kamar yadda aka saba kiransa, an ilimantar da shi tare da babban ɗan'uwansa Frederick VI. Sun yi karatu tare a Geneva, kuma a shekara ta 1788, sun shiga rundunar sojojin Prussia tare. A shekara ta 1793, ya yi yaƙi a yakin Pirmasens
Ka yi haƙuri. A shekara ta 1798, an daukaka shi zuwa Manjo. A shekara ta 1804, an daukaka shi zuwa laftanar Kanar kuma ya auri Gimbiya Augusta Amalia na Nassau-Usingen, 'yar Frederick Augustus, Duke na Nassau. Wannan "auren daular" tare da 'yar wani basaraken makwabta ba shi da farin ciki, kamar yadda ta ƙaunaci Count Frederick William na Bismarck. Auren ya ƙare da kisan aure. Augusta Amalia ta auri Frederick William; Louis William bai sake yin aure ba. Ricarda Huch ya ba da ƙarin cikakkun bayanai a cikin "Count Mark da Sarakunan Nassau-Usingen. Tarihi mai ban tausayi" na 1925.