Looking for any information on parentage of Edmund Garrett who dies 1803.

I have
Administration of his estate in 1803 when he leaves a widow and a young family including an unborn child.
No addidtional details on his burial in German - No MI or age given.
He marries Mary Kelly in 1789 in German when he is of this parish.
He is mentioned in the will of his mother-in-law Catherine Kelly (nee Corkill) when she dies in 1794.

Otherwise I am completely stuck and any details would be very helpful.

Carol