Meaning:
Its source is ei rikr, an Ancient Germanic name meaning "Complete ruler."
Popularity:
The name Ericka ranked 745th in popularity for females of all ages in a sample of 2000-2003 Social Security Administration statistics and 753rd in popularity for females of all ages in a sample of the 1990 US Census.
Though this name has fluctuated in use, it has been quietly present throughout the last century.
Narrative:
By coincidence, the Latin term for the herb Heather is spelled erica, and some botanically-oriented parents might name their children with this association in mind.