Help please - name confusions

[Margaret in Burton]

I have the marriage of William John Lally and Elizabeth Luke march qtr 1863 in Aston.

FMP has the parish record

https://www.findmypast.co.uk/transcript?id=R_846306726

It gives his fathers name as Michael Shephard Lally.

William John Lally's birth was registered in 1841 at St James Clerkenwell. MMN HEBBARD

A marriage between Michael Sheppard Lally and Sarah Hebbard is on Family Search for 6 June 1836 at St Andrews Holborn

1841 census has Michael, Sarah and daughter Ann Lally at St James Clerkenwell. Michael is a tailor born in Ireland.

https://www.ancestry.co.uk/interacti...7_659_660-0263

I can't find them in 1851 but in 1861 Sarah's husband is John H Sheppard same as as Michael should be, a tailor and born in Ireland. All the family are called Sheppard now. Definitely the same family as William has the same occupation as in 1871 (watch hand maker)

https://www.ancestry.co.uk/interacti...&usePUBJs=true


1871 John Henry Shepperd is a widower and living with William and his family as are William's siblings. John Henry was born in Westport, County Mayo.
Ann's occupation of actress made me smile, Sarah is a ballet girl.

https://www.ancestry.com/interactive...&usePUBJs=true


Are Michael Shepperd Lally and John Henry Shepperd the same man?
I haven't found a death for Michael.

Or

Did Sarah marry his brother /cousin? I can't find another marriage for her.