Courtesy of the David Vance SAPP process.

Dave Vance Named FamilyTreeDNA General Manager
www.jdvsite.com - The SAPP algorithm
0---Node# 904: FTA91796 (est.1250AD)> Est. TMRCA: 20 generations or 560 years ago (1390 AD)
        1---BP41468 William McWilliams 1800 Ahoghill, Antrim, Ireland: Map Big Y-700111 STRs FTDNA Known SNP: FTA91796 Est. TMRCA: recent. Kit is courtesy of the FTDNA M222 Project.
        1---Node# 848: Est. TMRCA: 17 generations or 476 years ago (1474 AD)
                2---MK85291 Robert Lockhart 1744-1817, Scotland:  Big Y-700111 STRs FTDNA Known SNP: FTA91665 FTA91665> Est. TMRCA: recent. Kit is courtesy of the FTDNA M222 Project.
                2---Node# 804: Est. TMRCA: 5 generations or 140 years ago (1810 AD)
                        3---247604 Andrew Lockhart 1737-1815 Ireland: Map Unknown67 STRs FTDNA Known SNP: M222 Est. TMRCA: recent. Kit is courtesy of the FTDNA M222 Project.
                        3---953647 Endicott Unknown Origin:  Big Y-700111 STRs FTDNA Known SNP: FTA91796 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).