http://javuh.cvs.sourceforge.net/viewvc/javuh/javuh/Model/Ps...
He seems to have been working on the same file, in the same day, as Jonathan Gillette. Probably poking around this repository a little more could lead to an almost-definitive answer.
Also, here: http://javuh.cvs.sourceforge.net/viewvc/javuh/javuh/Services... the @author is listed as:
11 * @author Why Carlisle (whytheluckystiff@mailcity.com)
EDIT: Still going....He talks about a 14-year-old sister here: http://www.advogato.org/person/whytheluckystiff/diary/14.htm...
This being written in 2001, that would make her ~21 now.
Searching for Jonathan Gillette, http://www.intelius.com/search-summary-out.php?ReportType=1&...
a few relatives are listed, presumably one of which would be his sister, however, none are in the right age range.
Right, back to work now, I promise.