Complex sentence: She changed her name to Erica, a name she derived from a phonetic pronunciation of Eddie; she said she attached a colloquial "ca" to the end of "Eddie" so that it sounded like "Eddieca" and formed the name "Erica".
Split into simpler sentences: She changed her name to Erica, a name she derived from a phonetic pronunciation of Eddie. She attached a colloquial "ca" to the end of "Eddie" so that it sounded like "Eddieca" and formed the name "Erica".