I need help!

I have so many questions for a McQueen researcher who knows what they are talking about.In Scotland, the McQueen family seemed to have started from the Outer Hebrides and moved Eastward ending up South of Inverness.What I need to know is this:Was Dugall McQueen actually married to Grace Brown Maclean and has anyone found his ancestry?There are many MacQueens living on the Isle of Skye, now.Are the McQueens and MacQueens all related to each other?

Anyway, if anyone could help me with my questions, I would greatly appreciate it.Also, do you know if the following family tree is correct?

       1       Dugall McQueen       1695 - 1747
....              +Grace Brown Maclean       1694 -
........       2       William Sr. McQueen       1734 - 1796
..............              +Henrietta Uhl       
...................       3       John Sr. McQueen1761 - 1855
........................+Polly Allenda 1770 - 1845
.......................4 Thomas Abraham McQueen       1797 - 1855
...................................+Mary Lee Beaty       
.................................5 John Beatty McQueen       
........................*2nd Wife of Thomas Abraham McQueen:       +[18] Nancy Tincher       1805 - 1870
.........................5Hamilton McQueen 1822 - 1913
.................................+Nancy Gum 1827 - 1889
...............................6Thomas McQueen 1863 - 1929
.................................+Cordie Seals 1883 - 1951

....................4John McQueen, Jr 1803 - 1894
...................................+Nancy       
.........................5 John Beaty McQueen 1825 - 1912
.............................+Eady Ellen Gum 1833 - 1884
...............................6 Robert McQueen       1862 - 1939
....................+Esther Catherine Chestnut 1865 - 1955
...................7 Benjamin Thomas McQueen       1886 - 1908
.............       +Sarah Sallie Alice Shearer       1884 - 1948
..........8 Robert Jessie McQueen       1906 - 1996
............+Mabel Leona Sanburn       1909 - 2003