Holly/Hally/Holley and Carey/Carew families of Golden and Kilfeacle - connections with Ryan family?

It’s possible the couple did not lie on their immigration records. If Nancy was 35 in 1841, then she was born c1806. At her death, she didn't provide the age--someone else did, and they could have been mistaken.
The following Walter Carew, born 1782, could be Nancy's father. I have not checked out the location of Killenaule Parish in relation to your family’s places.
CHURCH BAPTISM RECORD
NAME:WALTER CAREW
Date of Birth:
Date of Baptism:15-Sep-1782
Address:Not Recorded
Parish/District:KILLENAULE PARISH
Gender:MaleCountyCo. Tipperary
Denomination:Roman Catholic
FATHER:JOHN CAREW
MOTHER:MARY HACKETT
Occupation:Not Recorded
Sponsor 1 /
Informant 1:Richard Morris
Sponsor 2 /
Informant 2:Joanna Cahill
Notes:
L. TWIN WITH ENTRY NO. 868

Name:Honora CarewDate of Birth:
Date of Baptism:15-Sep-1782
Address:Not RecordedParish/District:KILLENAULE PARISH
Gender:FemaleCountyCo. Tipperary
Denomination:Roman Catholic
FATHER:JOHN CAREWMOTHER:MARY HACKETT
Occupation:Not Recorded
Sponsor 1 /
Informant 1:John Murphy
Sponsor 2 /
Informant 2:Margaret Pea
Notes:
L. TWIN WITH ENTRY NO. 867
© 2021 Copyright Bru Boru Heritage Centre (South Tipperary)
www.rootsireland.

The witness John Carew was likely a brother of Nancy Carew. Here are transcriptions of birth records for two children born 17 years apart to a John Carew and Margaret Ryan, one in Kilcommon and one in Upperchurch
Name:Margaret CarewDate of Birth:
Date of Baptism:08-Jul-1816
Address:ReiskParish/District:KILCOMMON
Gender:FemaleCountyCo. Tipperary
Denomination:Roman Catholic
FATHER:JOHN CAREWMOTHER:MARGARET RYAN
Occupation:
Sponsor 1 /
Informant 1:Patrick Carew
Sponsor 2 /
Informant 2:Mary Ryan
Notes:
[PRIEST NR]
© 2021 Copyright North Tipperary Genealogy Centre
www.rootsireland.i
Name:Margaret Carew
Date of Birth:

Date of Baptism:01-Aug-1833
Address:Not Recorded
Parish/District:UPPERCHURCH
Gender:Female
CountyCo. Tipperary
Denomination:Roman Catholic
FATHER:JOHN CAREW
MOTHER:MARGARET RYAN
Occupation:Not Recorded
Sponsor 1 /
Informant 1:Mary Ryan
Sponsor 2 /
Informant 2:Not Recorded
Notes:
* Margt
*** Margt
© 2021 Copyright North Tipperary Genealogy Centre
www.rootsireland.ie
I hope something here helps.

Thank you so much,Patricia, for your comments and for the baptism details! I will certainly follow up on those records - it's encouraging to have the Ryan name pop up.and to have a John Carew in the mix as well.

Thanks again, and best wishes

PS I've just looked on the map and Killenaule is about 21 km east of Golden and about 26 km from Kilfeacle.

Does anyone know how ow likely it is that families mixed and moved around between parishes at that sort of range in 18th and 19th century Ireland? 

Many thanks

BarbM.  You may want to consider joining our Hally Family History group on Facebook:  https://www.facebook.com/groups/hallygenealogy  

One of our members is currently researching the Hallys from Kilfeacle. 

Jon

Michael Hally 1830-1901 died USA wife Ellen Kiely 1837-1918 died USA.  They had children in Kilfeacle, Tipperary and lived there until ~1869.  Michael had a brother Luke Hally that returned to Kilfeacle and bought a farm died there 1903.  Mother of Ellen Kiely was Johanna Ryan

Thank you both very much for that information, Jon and D Hawley, it's very interesting. I'm not a great Facebook user, but I will try joining the Hally group..

From the records there seem to be several Hally families in the Golden/Kilfeacle area in the 1830s, including my ancestors, William Hally and Anne Carey/Carew. It's going back one more generation that has been difficult for me. 

Thanks again, Barb

      KILFEACLE TIPPERARY HALLY LINE- they move around

Patrick Hally in Tithe Rolls Kilfeacle probable father of Thomas

Son of Patrick:

A. Thomas Hally ~1800-1848 Kilfeacle wife Mary Noonan 1880-1 Nov 1875 Kilfeacle.  Wife takes over farm by 1848 after hubands death

       Children of Thomas:

1.  Michael Hally 1830 Ireland-6 Dec 1901 Wilkes-Barre Pa, USA married Limerick to wife Ellen Kiely 1837 Limerick-3 Nov 1918 Wilkes-Barre Pa USA

2.  Luke Hally 1832 Ireland-2 Mar 1903 Kilfeacle ,married Emly Tipp. to wife Mary Ftizgerald 1847-15 May 1904 Kilfeacle, Tipperary takes over farm after mothers death 1875

3.  Patrick 1837 Kilfeacle-22 Sep 1921 Queensland, Australia marrried Drangan Cashel Tipp. to wife Ellen St John ~1837 Ireland died 19 Nov 1906 Queensland, Australia

4.  John Hally ~1847 Ireland- 26 Feb 1901 Queensland, Australia married Emly, Tipp. wife Margaret Hourigan born Ireland dies Australia