"Blend of Elisa and Sandra"
The name Elisandra is commonly a female name from the "English" origin.
Elisandra is a blend of two established names, Elisa and Sandra, and its ending is the same -andra element found in Alexandra and Cassandra. The name first appears in US birth records in 1974, which fits a modern formation rather than an inherited traditional name. No meaning is attached to the combination itself; the sense comes only from the two names it is built from.
The pronunciation of Elisandra is el-ih-SAN-dra.