Family of Samuel Greer, Corlust

We have scoured the internet, including online sources of PRONI, Roots Ireland, etc. and have developed what we believe to be the family links of our ancestor, Samuel Greer, b. about 1775 in County Armagh, Ireland. Any information, confirmation, or extensions of the families of the two brothers Moses (#1) Greer and James (#1) Greer would be greatly appreciated!

1. - Moses (#1) (born around 1750)
    2.- son Moses (#2) (born around 1775)
          3.- son Moses (#3) (born around 1800 or maybe 1806)
    2.- son Samuel (#1) (b ~1775) married Sarah Guy (brothers Alex & John Guy, sister Peggy Shanks)
          3.- Moses (#4)(born just before 1800) farmed at Corlust, married “Bell”
                 4. unknown child
                 4. unknown child
                 4. Samuel (#2) b. about 1828
                 4. William, b. about 1830,
                 4. Alexander (#2) b. about 1833
                 4. Sarah b. about 1835
          3.- Alexander (#1) (born 1803 or 1805), went to Canada about 1823
          3.- John (#3) (born about 1807)
    2.- son John (#1) (killed in the mill)
1. - James (b ~1760 - a feeble old man when Alexander (#1) left for Canada)
    2.- son John (#2)
    2.- son James - went to America before 1823 we think
    2.- son David (Davy) - who may have been farming in Corlust in 1832

thanks

M. Greer