Courtesy of the David Vance SAPP process.

Dave Vance Named FamilyTreeDNA General Manager
www.jdvsite.com - The SAPP algorithm
0---Node# 841: Est. TMRCA: 11 generations or 308 years ago (1642 AD)
        1---IN129342 Thomas Rafferty 1843-1905 Unknown Origin:  Big Y-700, 111 STRs FTDNA Known SNP: BY177873 Est. TMRCA: recent. Kit is courtesy of the FTDNA M222 Project.
        1---B12350 Thomas Rafferty 1828-1895 Northern Ireland: Map M222, 111 STRs FTDNA Known SNP: FGC12950 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).