Crolly History, Family Crest & Coats of Arms
Irish names tend to vary widely in their spelling and overall form. The original Gaelic form of the name Crolly is "O Cruadhlaoich." This is derived from the words "cruadh," which means "hard," and "laoch," which means "hero." 
Early Origins of the Crolly family
The surname Crolly was first found in Moylurg, in the County Roscommon, where they started as a branch of the MacDermots. It is from Teige, a Prince of Moylurg, down to Cruadhlaoch that the line of descent for the Crowleys begins. A junior branch of the Crowley family also emerged and moved to the area of Dunmanway, in the west of County Cork. They eventually became a distinct sept with their chief at Kilshallow, thriving while their parent family gradually withered. The majority of the Crowley family came to be found in the county of Cork, with three-quarters of the family being born there in modern times. 
Early History of the Crolly family
This web page shows only a small excerpt of our Crolly research. Another 119 words (8 lines of text) covering the years 1172, 1658, 1713, 1819 and 1857 are included under the topic Early Crolly History in all our PDF Extended History products and printed products wherever possible.
Crolly Spelling Variations
Irish names were rarely spelled consistently in the Middle Ages. Spelling variations of the name Crolly dating from that time include Crowley, Crowly, O'Crowley, Croaley, Croawley, O'Crowly and many more.
Early Notables of the Crolly family (pre 1700)
Another 47 words (3 lines of text) are included under the topic Early Crolly Notables in all our PDF Extended History products and printed products wherever possible.
The 19th century saw a great wave of Irish families leaving Ireland for the distant shores of North America and Australia. These families often left their homeland hungry, penniless, and destitute due to the policies of England. Those Irish immigrants that survived the long sea passage initially settled on the eastern seaboard of the continent. Some, however, moved north to a then infant Canada as United Empire Loyalists after ironically serving with the English in the American War of Independence. Others that remained in America later joined the westward migration in search of land. The greatest influx of Irish immigrants, though, came to North America during the Great Potato Famine of the late 1840s. Thousands left Ireland at this time for North America, and those who arrived were immediately put to work building railroads, coal mines, bridges, and canals. In fact, the foundations of today's powerful nations of the United States and Canada were to a larger degree built by the Irish. Archival documents indicate that members of the Crolly family relocated to North American shores quite early:
Crolly Settlers in United States in the 19th Century