"Blend of Elly and Anna"
The name Ellyanna is commonly a female name from the "English" origin.
Ellyanna is a modern formation that joins Elly, a short form of names such as Eleanor, Ellen and Elizabeth, with Anna. The name is not recorded in United States birth data before 2000, which fits a recent coinage rather than an inherited name. The double letters in both halves are typical of twenty-first-century American spelling style.
The pronunciation of Ellyanna is el-ee-AN-uh.