$ apt-cache dump | grep '^Package' | awk '{print $2}' | wc -l && apt-cache dump | grep '^Package' | awk '{print $2}' | uniq | wc -l

152007

152007

You can call it lynx all day long, but it won't be lynx in the Ubuntu repositories as that name is taken, and as you can see above, there are no duplicates.