* Achoo! This is the most common spelling, especially in English-speaking countries.
* Atchoo! Some people prefer this spelling, emphasizing the "ch" sound.
* A-tishoo! This is another common variation, especially in some regions.
* Hatschi! This is the German spelling of a sneeze.
* Atschm! This is a more guttural spelling of a sneeze, emphasizing the expulsion of air.
Ultimately, the "correct" spelling depends on your personal preference and the context.