It's so pastoral. I see a stout, rosy-cheeked peasant girl from like up to 19th c. but probably medieval. To me it's almost comedic in how extremely rural, robust and old-timey but familiar it is (it's familiar because it appears in two mandatory school readings in Poland and I bet anyone can guess what kinds of characters Jagnas are in them and roughly what times the novels are set in xD )
I think it's an ok name but I also think it can be tricky to pull off.
https://www.behindthename.com/pnl/109883