Ron is absolutely correct in saying there are thousands of older Cymbidium hybrids out there that look like these and finding a name is impossible.
However, as you divide and repot your divisions, I recommend you put a clonal name and color on them, if you have not already done so, so that you can identify them in your own way. Your tag could look something like this: Cym. hyb. ign. 'Yellow Bird' for instance and all divisions of that plant would carry the same label. The hyb. ign. is a fancy way of meaning hybrid unknown. You can also use numbers, or names of your pets, loved ones or streets where you live.
Additionally, I always put the potting date on the top of the back of my labels as well as the color of the plant.
Last point, I urge you to sterilize all your tools by flaming, or soaking for a few hours in a 5% solution of clorox in between working on each large plant. Working on newspaper and changing it in between plants is important too to preclude the possible spread of virus contamination.
Good Luck,
CL