From the experts:
Like Friends, Ross is off the air and into syndication as a baby name, having plummeted from its zenith in the late 80s to fall off the US Top 1000 in 2013. Today, Ross is more likely to be a dad name than a newborn name.
Ross originated as one of the many Scottish names taken from the surname of a famous clan, and is a place name in that country as well. It's a quiet, understated Celtic name that could come back in the current climate of single-syllable boy name popularity, though it will probably take a few years.
Other notable Rosses besides the Ross Geller character include tycoon and maverick presidential candidate H. (for Henry) Ross Perot, mystery writer Ross (born Kenneth) Macdonald, and one of the twin sons of Jane Pauley and Garry Trudeau.