IGI gives the following information:
Dianah & Mary Scroggs baptised 18 April 1773 at St Nicholas Parish Reg and Nonconf(ormist), Newcastle Upon Tyne, Northumberland. No birth date given.
Michael Skroggs (sic.) baptised 18 June 1775 Newburn, Northumberland. No birth date given.
Carlander Scroggs baptised June 1770 South Shields, Durham. No birth date given.
All are children of Michael Scroggs & Mary. All are extracted records.
With such unusual names, it is therefore quite likely that Michael & Carlander (Clarinda) Scroggs are brother and sister.
I have not yet looked at the original baptism records, as mention of Michael the father's occupation, or Michael the son's occupation at his marriage in Liverpool in 1804 to Catherine Pikeman, might add weight to the connection, if it were a seafaring one, similar to that of the Pikemans.
Anne