Sure, Autumn is the most popular season name, but since it's been on the Top 100 for a decade now, it's hardly fresh. Consider a fall month name instead: If January and June are rising up the ranks, why not September, October (choice for his daughter of author Dave Eggars) or November?
Other month-related options: Seven, middle name of the Beckhams' newborn Harper, the number rooted in September; Octavia or Tavi; or Nova.
If flower names symbolize spring, autumn's nature names are dominated by trees, a much cooler category. Some of the best: Ash, Birch, Forrest, Hazel, Juniper, Maple, Oak, Willow. Attractive tree-related names include Daphne, which means laurel tree; Keziah, a biblical name that means cassia tree; and Lennox, a Scottish name related to the elm tree.