Google's Gary Illyes responded to a question on Twitter on Site Names. Site Names as we covered a few months ago, is where you can markup your pages to communicate to Google how to name your site in the Google mobile snippets.
Well, @jeffreypreston asked if this markup is supported on subdomains, for sites hosted on Blogger, WordPress and many other platforms or even internal subdomains. The answer is no, not currently.
Gary said, "we don't support subdomains for SiteNames."
@jeffreypreston Hey Jeff! Sorry, couldn't answer this on stage. ATM we don't support subdomains for SiteNames. Sorry @dannysullivan @smx
— Gary Illyes (@methode) June 8, 2015
Forum discussion at Twitter.