Ailysoomb History, Family Crest & Coats of Arms
The western coast of Scotland and the desolate Hebrides islands are the ancient home of the Ailysoomb family. Their name is derived from the name for the son of "Ellis" or Ellis' son. Conversely, the surname could be is derived from "Alice" as in "the son of Alice." It is likely though that the name was derived from "Ellis" rather than the female personal name.  
But Black goes on stating there is some dispute as to the origin: "On the other hand, with reference to Scottish Alison or Allison, Mr. L. A. Morrison in his The History of the Alison or Allison family in Europe and America, Boston, 1893, says that it is 'a fact beyond doubt that Alison comes from Alister or Alexander, and, further, that the Alisons are offshoots of the famous Clan of MacAlister" (p. 4), and that the origin of the name is due to two sons of Alexander MacAlister of Loupe who with some of their followers escaped to the parish of Avondale, Lanarkshire, during the War of Independence, and there later their name was changed from MacAlister to Alison (p. 18). He further states that 'the names Alison, Allison, Alinson, Allinson, and of Elison, Ellison, Elissen, Ellysen, are found thus spelled in the early history of some branches of the present Allison family. They are interchangeably mixed. The name was often spelled Ellison and Allison when referring to the same individual.' " 
Early Origins of the Ailysoomb family
The surname Ailysoomb was first found in the county of Lanarkshire (Gaelic: Siorrachd Lannraig) a former county in the central Strathclyde region of Scotland, now divided into the Council Areas of North Lanarkshire, South Lanarkshire, and the City of Glasgow, where they acquired some time before 1300 the territories of their family seat at Loupe. They were descended from Angus Mor MacDonnell, Lord of the Isles, their Gaelic name was MacAllister, and it is difficult through history to distinguish one name from the other.
One of the first clear records of the family was "Patrick Alissone del counte de Berewyk rendered homage, 1296."  This is an early record of Patrick's swearing allegiance to King Edward I of England, shortly after his invasion of Scotland.
Continuing, we found "Peter Alesoun was a witness in Brechin, 1490 (REB,, II, 134), Thomas Alesoun appears in Lochtoun, Scone, 1586 (Scon, p. 232), James Allasone was bailie of Ranfrew, 1688 (RPC., 3. ser. XIII, p. 243), and Gabriel Alason was bailie of the burgh of Dumfries, 1693." 
Early History of the Ailysoomb family
This web page shows only a small excerpt of our Ailysoomb research. Another 42 words (3 lines of text) covering the years 1296, 1314 and are included under the topic Early Ailysoomb History in all our PDF Extended History products and printed products wherever possible.
Ailysoomb Spelling Variations
Spelling variations were extremely common in medieval names, since scribes from that era recorded names according to sound rather than a standard set of rules. Ailysoomb has appeared in various documents spelled Allison, Alison, Alinson, Allinson, McAllister, MacAllister, Ellison and many more.
Early Notables of the Ailysoomb family (pre 1700)
More information is included under the topic Early Ailysoomb Notables in all our PDF Extended History products and printed products wherever possible.
Migration of the Ailysoomb family to Ireland
Some of the Ailysoomb family moved to Ireland, but this topic is not covered in this excerpt.
Migration of the Ailysoomb family
The descendants of the Dalriadan families who made the great crossing of the Atlantic still dot communities along the east coast of the United States and Canada. In the American War of Independence, many of the settlers traveled north to Canada as United Empire Loyalists. Clan societies and highland games have allowed Canadian and American families of Scottish descent to recover much of their lost heritage. Investigation of the origins of family names on the North American continent has revealed that early immigrants bearing the name Ailysoomb or a variant listed above include: William Allison who settled in Pennsylvania in 1764.