Simplify the following text for a Grade 12 native English-speaking person.
Original: Following his conquest of most of Western Europe , the first Napoleon made his elder brother Joseph ( 1768 â `` 1844 ) king first of Naples ( 1806 â `` 1808 ) and then of Spain ( 1808 â `` 1813 ) , his third brother Louis ( 1778 â `` 1846 ) king of Holland ( 1806 â `` 1810 ) ( subsequently forcing his abdication after his failure to subordinate Dutch interests to those of France ) and his youngest brother JÃ rÃ me Bonaparte ( 1784 â `` 1860 ) king of Westphalia , the short-lived realm created from some of the states of northwestern Germany ( 1807 â `` 1813 ) .
Simplified: He then made his elder brother Joseph ( 1768 â `` 1844 ) king of Naples ( 1806 â `` 1808 ) and then of Spain ( 1808 â `` 1813 ) , his third brother Louis , king of Holland ( 1806 â `` 1810 ) , and his youngest brother Jerome Bonaparte , king of Westphalia ( 1807-1813 ) .