I was named after Susan Lucci's character off of "All My Children": Erica Kane. And I think putting both a 'c' *and* a 'k' in the name loads it with too many letters.
This is the best way to spell this name. As this is my name, I'm so grateful that my mother, worn out after my natural birth [painful labor], "accidentally" spelled my name this way! With just a 'c' or a 'k', ie "Eric-a" or "Erik-a", it sounds plain and barely emasculates "Eric", whereas "Eric-ka" is almost like "Eureka!"