The name Ekaterina is a girl's name of Slavic origin meaning "pure". Ekaterina and is often added to lists like The International Variations of Catherine and discussed in our forums with posts like "Girls Makeover - Two Middles".
From the experts:
This exotic variation was publicized by Olympic skater Ekaterina Gordeeva. Though it's intriguing, it's sure to cause confusion in any English speaking country and in the U.S., all Katrina-sounding names are off the table since the devastating hurricane. Better to go with one of the Katherine variations or another Slavic or Russian name.