The correct spelling of "Reinert" is "ˈraɪnərt", with the stress on the first syllable. The "ei" in the name is pronounced as a long "i" sound, similar to how it sounds in the word "time". The "r" is pronounced with a slight roll or trill, as is typical in many Germanic languages. The final "t" is pronounced softly, almost like a subtle puff of air. Remembering these subtle nuances of pronunciation will help you spell and say the name correctly.