Though not stated specifically, the fact that it is plural indicates 2 or more.
We are not told.
Jabez Allies was born in 1787.
Jabez Allies died in 1856.
Jabez Coon was born in 1869.
Jabez Wolffe died in 1943.
Jabez Bunting was born in 1779.
Jabez Bunting died in 1858.
Jabez Willes was born in 1790.
Jabez Hughes died in 1731.
Jabez Leftwich died in 1855.
Jabez Leftwich was born in 1765.
Jabez Whitley died in 1904.