There is scene/take metadata fields, so you should add that information there. Leave the filename as is. You can rearrange the browser columns to show you scene/take if you’d like.
Also, do you have separately recorded audio, and did you use slates and have timecode jammed from audio to camera? If so, the audio files usually have scene take info, and as long as your tc matches, a program called Sync-N-Link X will sync all of that information for you and carry over the scene/take info in to FCPX.
Its not a big leap to jamming TC between audio and video. While you may not have it for this project you should go down this path for your next one, as it makes life so much easier and better to have some redundancy for syncing files.