What was the name of the inhabitants for the northern, southern, and western areas of former Czechoslovakia where  a German composerknown by his Czech name Jan Josef Abert  is from? 
Sudeten Germans
Title: Johann Joseph Abert
Passage: Johann Joseph Abert (20 September 1832 – 1 April 1915 in Stuttgart) was a German composer.  An ethnic German from the Sudetenland, he is also known by his Czech name Jan Josef Abert.
Title: Czechoslovak Hussite Church
Passage: The Czechoslovak Hussite Church (Czech: "Církev československá husitská" , "CČSH" or "CČH") is a Christian church that separated from the Roman Catholic Church after World War I in former Czechoslovakia.  It traces its tradition back to the Hussite reformers and acknowledges Jan Hus (John Huss) as its predecessor.  It was well-supported by Czechoslovakia's first president, Tomáš Garrigue Masaryk, who himself belonged to the Evangelical Church of Czech Brethren—the main Protestant denomination in what is now the Czech Republic.
Title: Sudetenland
Passage: The Sudetenland ( ; ] ; Czech and Slovak: "Sudety" ; Polish: "Kraj Sudecki" ) is the name for the northern, southern, and western areas of former Czechoslovakia which were inhabited primarily by Sudeten Germans.  These German speakers had predominated in the border districts of Bohemia, Moravia, and Czech Silesia from the time of the Austrian Empire.
Sudetenland Johann Joseph Abert