How do you say bed Gelert in Welsh?

There isn't a direct translation of "bed Gelert" into Welsh. "Gelert" is already a Welsh name, and it's assumed that the bed is named after the dog, Gelert, from the famous Welsh legend.

Here's how you could describe it in Welsh:

* Gwely Gelert: This is the most literal translation, using "gwely" for "bed" and "Gelert" as the name.

* Gwely'r Gelert: This is another option, using "r" to denote "of" or "belonging to."

* Gwely'r Ci Gelert: This emphasizes the dog aspect by adding "ci" (dog).

You could also use a phrase like:

* Gwely a enwyd ar ôl y ci Gelert: This translates to "A bed named after the dog Gelert."

It really depends on the context and how you want to emphasize the name and the association with the legend.