FreeBDM - have two Martha NICHOLSON deaths in Monmouth in 1837

J/A/S Qtr 1837
O/N/D Qtr 1837

Is this possibly???? Sarah NICHOLSON, sister, with her parents William & Sarah + Niece and Nephew, William & Eliza (the ages/names match quite well...)

1841 Census, Northumberland, St John St Nicholas
Clayton Street

Sarah NICHOLSON - age 35 c1806 - Schoolmistress - not born in County
William NICHOLSON - age 65 - Independent - not born in County
Sarah NICHOLSON - age 65 - not born in County
William NICHOLSON - age 6 - not born in County
Eliza NICHOLSON - age 5 - not born in County