Courtesy of the David Vance SAPP process.

Dave Vance Named FamilyTreeDNA General Manager
www.jdvsite.com - The SAPP algorithm
0---Node# 1012: Est. TMRCA: 18 generations or 504 years ago (1446 AD)
        1---527133 John McGrath 1817-1908 Meath, Ireland: Map Big Y-700, 111 STRs FTDNA Known SNP: FTC51662 Est. TMRCA: recent. Kit is courtesy of the FTDNA AODH Project.
        1---B448638 Mat Magrath, 1802-1866 Ireland: Map Big Y-700, 111 STRs FTDNA Known SNP: A725 Est. TMRCA: recent. Kit is courtesy of the FTDNA M222 Project.

Note: Dates are measured from the epoch which is 1950 and age estimates vary by 15% to 20%. The few red colored ages (on the SNPs) and the green age at the top is Family Tree DNA's eatimate for the SNP itself. The green in-line ages are the SAPP estimate for the kits being analyzed (not the SNP).