I recently just changed my Spartan company name, but misspelled it. Does anyone know how/when i can change it again?
You can change it once every 30 days, though I may be able to fix it for you. Assuming you meant Fireteam Eclipse? 
yeah
Than name is taken unfortunately: https://www.halowaypoint.com/en-us/spartan-companies/fireteam%20eclipse
If you find names that aren’t taken, feel free to reply here or you can drop me a PM