Question

Could a source be posted for Mary's surname, please?

Comments

The profile manager is an active member.  I'd start by asking her if she has something.

Answer 1

If you don't have the information to post, but would like some attention on it, maybe adding {{Unsourced}} could help. "Ancestry.com" is not a proper source, in and of itself. 

Answer 2

If you don’t have Ancestry access you can try familysearch.org

Answer 3

I added the only source I found on Family Search.  It may or may not be for this particular profile, depending on her religious beliefs (b. 1698, bapt. 1722).

Oddly enough, there is another woman named Mary Etherington who married a James MacFarland in the 19th c.

Comments

I looked at this again.  The 1822 baptism is for her daughter, not her.  You may need to search in the public library or historical society.