Take a look at the IGI for submited and extracted info I mentioned in above post...let me know what you think, or want me to try and follow...I will see what I can do after work tomorrow. Here is some info, don't know if there is any more to add...
The bapt. for Morgan Manner 1805 Merthyr is on the index Parents Howel & Mary and other siblings
This marriage from Glam index would tie in...
Morgan Maner - Anne Evans Merthyr Tydfil, 19 July 1830 by banns, both of Parish
WM MANNER Birth: 1832 (submitted)
Other Events: 16 MAR 1851 Merthyr Tydfil, Glamorgan
No other info, don't know what it means about other event...if your enquire about the finche at your FH centre for possible brother 'Thomas' (below) it may include the bapt. for Wm. it is within dates.
This is the only extracted record on IGI
THOMAS MANNER Birth: 21 APR 1836
Bapt: 15 SEP 1836 Twyn-Yr-Odyn Presbyterian Or Unitarian, Merthyr Tydfil, Glamorgan, Wales
Parents: MORGAN MANNER Mother: ANN EVANS
Births and baptisms, 1804-1836. Batch Number C103021
The Unitarian Chapel is located in Twyn yr odyn in the parish of Merthyr Tudful. Although it is a Unitarian Chapel, the records state that it is Prebyterian.
Also these deaths may relate to wife/mother between 1841 - 1851 no other varient of name checked all Ann/Anne
Deaths Sep 1847 Mainwaring Ann Merthyr Tydfil 26 279
Deaths Sep 1849 Mainwaring Ann Merthyr Tydfil 26 446
You could possible write or ring Merthyr Registry office to confirm if Morgan was informant or address is same and then purchase cert etc.
Also another avenue would be Merthyr cemeteries. The Bereavement Service offer very useful assistance to researchers from the registers... google for info.
You may never get to the bottom of the name change...I have ancestors who went by 'Mordecai' or 'Mort' some used it interchangable other families stuck to one name or the other...this was across the entire extended clan and generations. No one knows why...yet
Just incase it may help what were the witness names on cert, and fathers' occupations?
Cas