If you named the device under General>Settings>About>Name it will show with that name, (for example, my iPhones are listed as GB's iPhone 5s, GB's iPhone 7, etc.). However, if not, then it will just show iPhone or iPad. This would be true wherever you are looking at the device list, whether it be in Find My iPhone, on your Apple ID, or in iCloud.com. This would also be true for the name of the device if you hook up to iTunes to sync it.
If you didn't ever name it, then it would just be a generic name.
But if you see an iPad listed when you sign into iCloud.com and open Find My iPhone, then try that Apple/iCloud ID and password. If that one isn't right, then check another known Apple/iCloud account to see if an iPad is listed.
If you have the original sales receipt, then you can take the device to your local Apple Store along with a photo ID, and they should be able to remove the lock. But you must be the original owner (sales receipt from Apple or an Apple Authorized Reseller).
Best of luck,
GB