I'm not related at all and my opinion may not count, but I'm tossing it out there anyway.
I would bet this is the same Albert Embree in Wilkinson, MS in the 1870 census, son of Jonathan & Sarah, and brother to Ella. In the 1880 census, he's living with Ella and her husband in West Feliciana.
My guess would be that the person who supplied the information for the death certificate gave misinformation. Felix may have been a nickname for his father. (I found that on my husband's grandmother's death certificate.)