Denis Guerin b. circa 1827 and Mary Healy b. 1827c.Married in Mitchelstown county Cork 1846. Came to Australia circa 1855. (Ship unknown)

Looking for connections in and around Mitchelstown now????
Noticed on google map OF Mitchelstown a nearby site called Guerins cross what is this about?can anyone help?

I do not know who Denis's parents were so could do with some help if possible.