Elizabeth Paton or later Elizabeth Andrew of Lairgieside was the daughter of James Paton. Betsy was employed as a servant a girl at Lochlea Farm during the winter of 178384, but returned to her own home when the Burns family moved to Mossgiel Farm in March 1784.
When baby bonnie Betty was born Burns expressed fatherly tenderness, forgetting his earlier masculine posturing. In a Poets welcome to his Lovebegotten Daughter or alternatively his bastard wean we find160
Source: Wikipedia