So, matching pairs in the 1dnd phb:
Humans (no match)
Elf, Dwarf (the classics)
Gnome, Halfling (smol)
Goliath, Orc (swol)
Tiefling, Dragonborn (elemental)
Notice how the ones on the left are more magically themed than the ones on the right, who tend to be more physical oriented. Goliaths are...