The term "Aromanian" derives directly from the Latin "Romanus", meaning Roman citizen. The initial "a-" is a regular epenthetic vowel, occurring when certain consonant clusters are formed, and it is not, as folk etymology sometimes has it, related to the negative or privative "a-" of Greek (also occurring in Latin words of Greek origin). The term was coined by Gustav Weigand in his 1894 work "Die Aromunen". The first book to which many scholars have referred to as the most valuable to translate their ethnic name is a grammar printed in 1813 in Austria by Michael Boiagi. The Greek title was "Grammatike Romanike Etoi Makedono-Blachike" (Roman or Macedono-Vlach Grammar).