The only giant panda twins in the United States were named Ya Lun and Xi Lun at the cubs' 100-day naming celebration on Monday at Zoo Atlanta.

Ya means "elegant", and Xi means "happy". Lun honors Lun Lun, mother of the twins. Together, the names mean "Lun Lun's elegant and happy daughters".

The winning names are from among seven sets supplied by conservation partners in Chengdu, in Sichuan province. The names Ya Lun and Xi Lun received over 11,000 of the more than 23,400 votes cast by panda fans worldwide.