Looking for the Parish that Peter Marshall & Jane Bell came from & were married in.

Looking for the Parish that Peter Marshall & Jane Bell came from & were married in.  Peter Marshall born abt 1804.  Jane Bell born abt 1805.  They lived in the Dublin area.  Possibly married in County Wicklow, 4 Oct 1830.  By 1835 the family was in the USA.  Any information on the family is greatly appreciated.  rebeccaball@sbcglobal.net