From The Collaborative International Dictionary of English v.0.48 :
Sonsy \Son"sy\, a.
See Soncy. [Scot.] --Burns.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 :
Soncy \Son"cy\, Sonsy \Son"sy\, a. [Scot. sonce, sons,
prosperity, happiness, fr. Gael. & Ir. sonas.]
Lucky; fortunate; thriving; plump. [Prov. Eng. & Scot.]
[1913 Webster] Sond