Courtesy of the David Vance SAPP process.

Dave Vance Named FamilyTreeDNA General Manager
www.jdvsite.com - The SAPP algorithm
0---Node# 953: Est. TMRCA: 10 generations or 280 years ago (1670 AD)
        1---226745 Terence McGrath 1780-1878 Cavan, Ireland: Map Big Y-700, 111 STRs FTDNA Known SNP: FTC15936 Est. TMRCA: recent. Kit is courtesy of the FTDNA M222 Project.
        1---676812 Thomas McGrath Ireland: Map Big Y-700, 111 STRs FTDNA Known SNP: FTC87759 FTC87759 (est.1800AD)> 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).