Dwarfkin

The dragonborn and the dwarves have a long, generally positive history. Being so landlocked and usually underground, dwarves never made good targets for raids. When the ancient Üth Empire attacked and conquered the dwarves in the Age of Steel, Ashmen flew to their aid and freed the dwarves.
Because of this long standing relationship, many dragonborn have made their homes in dwarven lands. The first of these acted as defenders of the realm, swearing to protect the dwarves against future threats. Now they have adapted to many of the same roles that dwarves take. Some have even been welcomed into a clan and granted a clan name.

Dwarfkin Traits

In addition to the traits you get as a dragonborn, you also get the following traits.

Ability Score Increase

Your Intelligence score increases by 1.

Languages

You can also speak, read, and write Dwarvish.

Adopted Clan

Choose one dwarf clan. Aside from the ability score increase, you may choose one ability granted by that clan. Work with your DM to make sure your backstory fits.

Darkvision

Though not as accustomed as a dwarf, you can certainly see better in the dark than your surface kin. You can see in dim light within 30 feet of you as if it were bright light, and in darkness as if it were dim light. You can’t discern color in darkness, only shades of gray.