Thanks for your valuable input, Richard.
Actually, the referred volume starts with "Index to the registers of St. Mary Ann's Parish, Cecil County" images 3-55, followed by "Church records: St. Mary Ann' parish, Cecil county, Register and vestry proceedings 1713-1799" images 57-224 (Births, deaths and marriages start at image 195), then "Tombstone records from Old West Nothingham Cemetery at Rising Sun" image 225, and then "Index to vestry proceedings" images 226-235, and then "Index to the register of births, marriages and deaths in St. Stephen's Parish, Cecil County" images 236-344, followed by "Marriages, Births and Deaths St Stephens Parish, Cecil County, Md, Copied in 1892 by Miss Lucy H. Harrison, 1687-1837", image 346-446, and finally "Records of St. Stephen's Church, North Sassafras Parish, Cecil County, Md. Copied in 1892 by Miss Lucy H. Harrison, 1687-1804", image 447-640, with index in images 641-654.
I have extracted the lines involving the names Auren, Avren and Avron, from the records I mentioned. Since it got rather bulky, I made a free space profile: Space:Jon_Auren%27s_descendants%2C_18th_century_- (link: https://www.wikitree.com/wiki/Space:Jon_Auren%27s_descendants%2C_18th_century_-)