Shirra Scotland

Hi, I am researching my family tree, on display at www.thesweetfamily.co.uk, and the Sweet connection to Robert Shirra, minister in Yetholm, Roxburghshire. his dates are 1758-1840 and he married a Mary Gibb. He is reputed to be a cousin of either Ann Sweet (1801 - 1879) or her husband, Robert Sweet (1798 - 1866).

I am looking for the Shirra tree that this Robert Shirra is descended from.

Thank you

Martin Sweet