1.Mary Allis, born April 25, 1709 in Bolton, Tolland, CT; died Aft. 1750.She was the daughter of 2. Nathaniel Allis and 3. Mercy Dudley.She married (1) Benjamin Johns February 24, 1727/28 in Bolton, Hartford, CT.He was born October 11, 1704 in Roxbury, Suffolk Cty., MA.
Generation No. 2
2.Nathaniel Allis, born 1685 in Hatfield, Hampshire, MA; died February 05, 1750/51 in Bolton, CT.He was the son of 4. John Allis and 5. Mary Meekins.He married 3. Mercy Dudley November 28, 1705 in Wethersfield, Hartford Co., CT. 3.Mercy Dudley, born 1684 in Guilford, New Haven, CT; died June 29, 1731 in Wethersfield, Hartford, CT.She was the daughter of 6. John Dudley and 7. Martha French
As far as Elizabeth Allis is concerned I doubt there is an Allis surname connection.Allis is often used as a first and middle name.