You can eliminate Cath Quayle 1806 Marown d/o William Quayle/Catherine Cubbon. I believe she married Wm Boyde in 1829.

Also Cath Eliz Quayle 1806 Lezyare d/o Wiliam Quayle/Mary Caley--md Thomas Cowley 1832

It usually is safest to consider at least a 2 yr range on either side of 1806 unless you know the specific birthdate--in this time period the IGI, etc use the christening date.

Donna