Greulich and Graulich are early forms of the surname. Graulich is believed to come from Greulich from the Middle High German word griuwelich, which means "horrifying". This was a nickname for someone who inspired fear. Grauling is a rare variation of the surname and known persons of this name appear to be related going back to Bleichenbach, Oberhessen (Provinz), HESSEN, Germany. Most US branches came to Baltimore, Maryland. This Grauling line goes back to earlier Graulich ancestry in early German church registers. The earliest known ancestor is Johannes Graulich c1645-1712. Johannes' great grandson Johann Michael Grauling (1735-1777) is the known originator of the Grauling spelling. Grouling is a modern variant taken by Charles Louis Grouling (1887-1966) and his issue. The surname is often misspelled in early historical documents such as census records, with examples including Krauling, Crowling, etc. These were not adopted as consistent spellings.