I'm not related to this family; I own the 1879 The History of Montgomery County Maryland, and it contains the following about the ALLNUTT family:
Dawsonville, MD, four and a half miles from Boyd's Station.Population in 1879 was 75 persons.Farmers listed as residents include: Benjamin Allnutt Berroni Allnutt James N. Allnutt Nathan W. Allnutt
Laytonsville, MD, seven miles from Gaithersburg.Population in 1879 was 100 persons.Farmers listed as residents include: J.B. Allnutt John Allnutt John T. Allnutt William Allnutt
Land Grants of Montgomery Co., MD: "Partnership" Surveyed for Charles Diggs and John Bradford, April 16, 1728, for two thousand acres; lies on Dry Seneca, and embraces the farms of Thomas Darby, Robert H. C. ALLNUTT, Samuel Dyson, F.S. Poole, John T. Fletchall, and others.