In a recent DNA study of Irish surnames which included 50 McEvoys, 28 were of haplogroup R1b3 and 22 of haplogroup IxI1b2, the latter group including nearly all the participating McEvoys from Ulster.
(See http://www.gen.tcd.ie/molpopgen/resources.php, download via the link "Supplementary Information.xls" into MS Excel, select the "Genotypes" tab.)
One of the joint authors of the study is also a McEvoy - just a coincidence.
[From Ciarán Ó Duibhín]

Tracie Ott tracott@comcast.net will take any questions about Murthy McAboy.
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6-6-1679 John Harris, Commander "Ship Dover" makes oath of passengers imported into Calvert Co. Maryland 3-21-1678 from London England & receives his bounty.
Lawrence Knowlas to Richard Edelen of "Charles Co", 100 acres due for transporting Mortogh Macoby & 11 others into "This" Province.
6-6-1679 Richard Edelen of "St. Maries Co. assigns to Phillip Cole & John Morrister 150 acres due Lawrence Knowles for transporting Mortogh Macoby & 2 others into "This Province".
Maryland State Archives 15:566 (SR4327); CB2:49 (SR7366)
Note: Kinship has not been proven but is highly likely [From Larry Mocabee]
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Matthew McBee arrived on the ship Katherine on November 8, 1678 [from the Maryland Land Office 1673-1679]. He was transported to Maryland by William Stevens of Somerset County, Maryland. He is listed as a well to do tobacco farmer. In the Court Records of Prince Georges County 1696-1699, Matthew McBee is listed as a planter and Press Master for Collington Hundred. The Queen Ann Parish register of Prince Georges County lists the births of Matthew and Jane's children. Matthew left no will and the inventory of his estate was taken May 16, 1709 and proven on July 1, 1709 in Prince Georges County, Maryland.
[From Danny McBee]#6922 Marvin McAbee; Michal McKee  #130070 James Harold McBee