Starting Sept. 30, 2014, Genealogy.com will be making a big change. GenForum
message boards, Family Tree Maker homepages, and the most popular articles
will be preserved in a read-only format, while several other features will
no longer be available, including member subscriptions and the Shop.
I'm sorry, but I never heard of people having the last name Rients. However, I do know that it is used as a first name, especially in the Friesland province of the Netherlands. For instance there is Rients Gratama, a singer and comedian.
Hope this answers your question a bit.