I would say the easiest way to find out would be to try. Apple doesn't say one way or the other if the receipt has to be in your name, just that you should keep it. Unlike other people who have responded, I would think that it would be extremely unlikely that a thief would have the device and the receipt for its purchase from Apple, hence your having the receipt should be acceptable. Only Apple can say.
Apple can completely reset a device if a person can provide sufficient evidence of valid ownership. Do this online at: Activation Lock support request - https://al-support.apple.com/#/additional-support Apple says, "Proof of ownership documentation is required," but does not detail what currently constitutes proof. Prior to this new online service Apple typically required the original receipt issued by Apple or an Apple Authorized Reseller and documented provenance (so typically it would be the original owner who does this, or a descendant with legal proof of ownership). This will give you access to the device but won't restore access to the account used to lock it. There is nothing that can be done to expedite an Activation Lock request.
Apple recommends you "Keep your receipt after you buy an Apple device" --> Keep your receipt after you buy an Apple device - Apple Support
P.S. I'll add that a person might just be able to change their name on their account to match that on a receipt, so again just having a receipt regardless of name should be sufficient.
Do let us know if it works for you!