Gunderson marriages Durham 1900s

[Christopher]

Hello,

I hope some one is able to assist me establish a connection with Mary Gunderson, her daughter Anne, and Co. Durham. I have already established some of the links in Co. Antrim and I am more interested in the Co. Durham connection

1900 - Co. Durham
Mary Blackett de Banke Gunderson (nee Phillips), widow, married Richard Dunn on 10th Oct

1905 - Co. Durham
Anne Christina de Banke Gunderson married Alexander Erskine Alexander on 18th of April

Annie Christina de Banke Gundersen (b 17.2.1880, d 5.3.1945)
Parents - married on 19.7.1877 at St Annes in Belfast.
Hans Christian Gundersen (b 1844 d 17.6.1897) and Mary Blackett de Banke Phillips (b 1860, d 31.1.1944)
Erskine Alexander born 2nd April at Ballyclare, Ballyeaston, Co. Antrim
Parents - Andrew Alexander and Janet (nee Erskine)

Andrew Alexander born approx 1830
A mysterious young girl

Thank you, Christopher