If you look on page 2 of the FTDNA Y-Haplogroup I2a Project - Y-DNA Colorized Chart, you will notice that Nance is the dominant Surname in I2a2b Isles B1 group, with 7 of 28 (25%) of the members in that group. Notice that Grimes, Grant, Wrensch, Williams, Blake, Sharpe are all in between...