Brimmer is an extremely important sire seen in a number of mare families. He sired Old Thornton, third earliest mare in the lineage of Family 2; Brimmer Mare (out of Trumpet's Dam), dam of Brown Farewell (grandam of Matchem) and Bay Layton in Family 4, the two mares through which most of Family 4 descends; Brimmer Mare, 5th dam of Eclipse and a Foundation Mare of Family 12; Brimmer Mare in Family 37, the grandam of 7 times Champion Sire Bay Bolton; Brimmer Mare, the second earliest mare in the lineage of Family 40; the Foundation Mares of Families 25, 57 and 70;

and a Son of Brimmer, sire of the top class 1700s decade racehorse and useful sire Ruffler