The Verge cited a "reliable source" as saying that Key Lime Pie will come after the expected Jelly Bean update to Android in 2012, most likely launching the following year.
Last autumn, Google unleashed Android 4.0, named Ice Cream Sandwich, with the Samsung Galaxy Nexus smartphone. It is now running on various handsets and tablets.
It is thought that Google will launch Android 5.0 Jelly Bean this year, potentially as early as the second quarter, as it attempts to keep ahead of Apple's iOS operating system.
Google even hinted at the forthcoming release by serving bowls filled with jelly beans on its stand at Mobile World Congress in Barcelona last month.
The Verge said that the source who revealed the Key Lime Pie plans was the same person that provided the tip off about Jelly Bean last year.
The title would also continue Google's alphabetical approach with the operating system; Gingerbread, Honeycomb, and Ice Cream Sandwich to date, and followed by Jelly Bean and Key Lime Pie.
Meanwhile, it has been reported that Google is working on a voice assistant system to rival Apple's Siri, potentially for inclusion in the Jelly Bean Android release.