A wee bit more...just working from the census and certificates as the on-line trees were confusing me no end!
Elizabeth Dakers - parents James Dakers and Jessie Anderson married 1886 - from the certificate his parents listed as Alexander Dakers (Seaman) and Helen Smith.
Alexander Dakers dies 1891 age 63 - cert states Seaman Merchant Service married to Helen Smith - parents Alexander Dakers (shore porter) and Jane Low.
Alexander Dakers dies 1860 age 57- cert states Innkeeper, married (no name given

) - parents William Dakers (agricultural labourer) and Isabel Scott. Son Alexander signs the DC - his address given as Castle Street, Montrose - Helen and the family are living in Castle Street in 1861 - husband Alexander presumably at sea at the time of the census.
Alexander and Jane/Jean Low can be found living Rossie Island in 41 - he's down as shore porter and in 51 he's down as public house keeper.
Now the Betsy Jolly who marries into the Dakers - would that be David and Isabel Stewart's daughter? It's just she's sitting in my pile of Fettercairn Jollys without a hubbie. Sorry, that should have been their granddaughter, parents James Jolly and Ann Christie.
Jen