Image is here
and what is weird is there's another one on the same page - SMYTH OR KNOTT.
I can only think maybe some registrars were doing the certs in a non-standard way and the indexers decided to treat them as ambiguous.
One possibility is that the father box is empty and the mother box has 2 names, but there's nothing to show whether she was ever married, or whether she had two names for some other reason.
Note there's no "surname of child" box. The name in the first column is surname of father, if given, otherwise mother.