Can gerbils learn their names

I can't be certain, but I don't think guinea pigs actually learn their names.

It's more likely that they learn to recognise your voice, rather than to respond to their actual name.

So, if an owner calls to its guinea pig 'Roger, Roger' or whatever, it will probably learn to recognise his or her voice - and as it knows that owner - it will respond.

It might also associate the voice tone, or perhaps even the Word (but that is less likely) to something.

For instance, if the owner calls to its guinea pig 'Roger, Roger' whilst he or she is feeding it, or petting it, then the guineapig will associate the owner's cry of 'Roger' with food or petting.

So basically, either way, when this owner cries out the name 'Roger' then the guinea pig will probably respond.

Then again, maybe there is a super intelligent guinea pig out there that learns its actual name, so even if the owner says it in a really souped up voice, it still recognises it. But, sorry to ruin it for you, I highly doubt that.