Yes, Patrick McDaniel was Ellen's younger brother so therefore John Lockyer Huntly's brother-in-law.  Ellen's only sibling.  Both were born in Passage West, Cork.  Mother was Anne Curran born West Passage, and father was Richard McDaniel often McDonnell/Mcdonald.  He was born in Stornoway.  Both father and son drowned at different times, off the coast of Port Fairy.  The "infants" named in the Will/Probate are Patrick and Lavinia's children.