The marriage for Augustus Calvert and Charlotte Percy is available at ScotlandsPeople.He was widowed, first wife being Mary Sanderson whom he married 4 Sep 1833 at Saint Laurence, York, England.Charlotte's parents were Philip and Mary Percy.Although Charlotte and her parents were all born in Ireland, beginning with the 1841 census they can be found in Scotland. They moved to Scotland about 1838-1839.
1841 Scotland Census Name: Philip Percy Age: 25 Estimated Birth Year: abt 1816 Gender: Male Where born: Ireland Civil parish: Dunipace COUNTY: Stirlingshire Address: Lairochs Occupation: Ag Lab V Spiner Ded Parish Number: 478 Household Members: Name Age Philip Percy 25 Mary Percy 23 Charlotte Percy 6 Margaret Percy 3 Mary Percy 1 Cathaine Williams 15 Henry Percy 20 Timothy Abyle 20 James Gow 25 Elizabeth Gow 25 James Gow 5 Janet Gow 3 Elizabeth Gow 1 David Fleming 22 Margaret Fleming 20 Mary Fleming 2 Euphemia Fleming 3 MO
1851 Scotland Census Name: Philip Percy Age: 36 Estimated Birth Year: abt 1815 Relationship: Head Spouse's Name: Mary Percy Gender: Male Where born: Ireland Parish Number: 476 Civil parish: Denny Town: Denny COUNTY: Stirlingshire Address: Main Street Eagle Tavern Occupation: Spirit Dealer ED: 3 Page: 36 (click to see others on page) Household schedule number: 141 Line: 9 Roll: CSSCT1851_99 Household Members: Name Age Philip Percy 36 Mary Percy 33 Charlote Percy 15 Margaret Percy 12 William Percy 6 John Percy 3 Ann Percy 1 Agnes Pringle 15
In 1861 Charlotte is living away from her parents:
1861 Scotland Census about Charlotte Percy Name: Charlotte Percy Age: 25 Estimated Birth Year: abt 1836 Relationship: Servant Gender: Female Where born: Ireland Registration Number: 578 Registration district: Ayr Civil parish: Ayr COUNTY: Ayrshire Address: 14 High Street Occupation: Barmaid ED: 3 Household schedule number: 30 Line: 1 Roll: CSSCT1861_82 Household Members: Name Age Elizabeth S Macpherson 44 Emma Macpherson 16 Mary Macpherson 15 Alexr Macpherson 12 Hugh S Macpherson 4 James Taylor 57 William Michell 29 Charlotte Percy 25 Agnes Ann Yelding 34 Janet Johnstone 23 Marion Johnstone 19 Agnes Mckenzie 23 Christina Campbell 21 Mary Tarbet 18
In 1861 her parents are living in Glasgow:
1861 Scotland Census about Philip Percy Name: Philip Percy Age: 45 Estimated Birth Year: abt 1816 Relationship: Head Spouse's name : Mary Percy Gender: Male Where born: Ireland Registration Number: 644/2 Registration district: High Church Civil parish: Glasgow Inner High COUNTY: Lanarkshire Address: 20 Burrels Lane Occupation: Muslin Printer ED: 14 Household schedule number: 66 Line: 20 Roll: CSSCT1861_98 Household Members: Name Age Philip Percy 45 Mary Percy 45 Mary Jane Percy 20 Wm Percy 16 John Percy 12 Ann Percy 11 Isabella Percy 6
I don't have experience with Irish Genealogy records so can not trace the family back beyond 1841.