Owen Conway 1788 1873 Letitia Conway 1793 1843 Margaret Conway Mrs Rev Moore Morgan 1785 1862 Are These Three Siblings

Name: Owen Conway
Estimated birth year: abt 1788
Date of Registration: Jan-Feb-Mar 1873
Death Age: 85
Registration district: Gortin
Volume: 2
Page: 108
FHL Film Number: 101589
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A death notice in the Limerick Chronicle June 7, 1843 reads: "At Lower Dorset Street, Letitia, daughter of the late William Conway Esq., South Anne-street". I have a burial record for her in Dublin 1843.
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These are the only two pieces of recorded information I have been able to find on these two, who may well be siblings of Margaret Conway-Morgan.

Any help would be greatly appreciated.

Rodney53