Thomas Parker & Margaret Duck

Hello , hope you are all doing great:

I'm still searching info about my Parker line, and recently I've found a couple of records, possibly a sibling of my great great granmother , could you please take a look and let me know what your thoughts are?

What I have is this:

Daniel Parker married to Margaret/Marcella Geraghty in 1821, parent of:

-Anne Parker ( 1823) - my great great grandmother

-Catherine ( 1832)

-Patrick (1834)

all of them from Rathowen, Russagh, Westmeath

I know that this parish doesn´t have all the records, and there are some gasps, bue I've find this:

Thomas Parker, married 6 of November of 1869, in Rathowen, Russagh, to Margaret Duck

the groom is about 31 years old, and his father is Daniel Parker, from the same parish, as a witness. 

I know that the parish didn`t cover those years of baptisms, but something is telling me that Thomas could be the brother of Ann ( my great great granmother) , Catherine and Patrick

Even the witness of the marriage of Daniel Parker to Marcella/Margaret Geraghty in 1821, is Thomas Parker,maybe Daniel`s father and the granfather of the Thomas I've just found...( anbd since is the 1st male, can be the name of his grandfather)

What are your thoughts?

have a great day! xx

Diana