Hello Portybelle,
The first Davina Abercrombie Burt Marshall was born 27 May 1869 in Aberdour, Fife. Her parents were Andrew Marshall (born 1829 in Inverkeithing, Fife) and Janet Mitchell (born 1824 in Dalgety, Fife).
The second Davina Abercrombie Burt Marshall was born 11 Apr 1888 in Ladhope, Galashiels. Her parents, Andrew Marshall (born 1862 in Aberdour) and Mary McLean (born c. 1862 in Bathgate, West Lothian)
I don't see any of my family names on your list of interests, so I imagine the similar name is just a coincidence.
Interesting, though!