Ungraceful Graphs

• 16-Cell
• Berlekamp-van Lint-Seidel Graph
• Brinkmann Graph
• Brouwer-Haemers Graph
• Butterfly Graph
• Cameron Graph
• Delsarte Graph
• Doyle Graph
• Grabarchuk Graph
• Grünbaum Graphs
• Hall Graph
• Jørgensen Graph
• Large Witt Graph
• Peisert Graph
• Pentatope Graph
• Robertson Graph