arrol in deptford, london

I've traced back to an ANN ARROL(b1810 in Deptford), dtr of Ralph ARRELL and Christiana (or Charston or Claxton!)SCOTT.
Lots of Arrol's in deptford going back to the 1700s.

Does anyone know anything about these?

Others include:
Christiana (1814), Christian (1819), Robert (1816), Alexander (1812) and Alexander (1821) - all siblings of ANN.

Also in 1881 census for Deptford:Robert, Sarah A, Alice K., Adelaide M. - family of Robert G.