[qw3rty01]

"Even I" is pretty common for native speakers, although it's normally used to break an assumption rather than being a full replacement for "I also".

For example: you are in a class and someone asked a question about a topic. The person next to you turns and says "I can't believe they don't understand this topic." Your neighbor is making the assumption that you also understand it. So if you didn't understand the topic, a response could be "Nah, even I had some questions about it."

Although someone could definitely use it to be condescending, or just trying to be cheeky.