The word "holtz" is a surname that can be spelled in different ways, depending on the language and origin. In English, it is usually spelled "Holtz" or "Holz." The pronunciation of the word is /hoʊts/, with the "o" sound being long and the "z" being pronounced as a voiced "s." In German, the word is spelled "Holz" and is pronounced /hɔlts/, with the "o" being short and the "z" sounding like an unvoiced "s." The spelling of the word "holtz" can vary, but its pronunciation remains almost the same.