Trina (also variantly spelled as Triena) is also used in Dutch and Limburgish, where it is a short form of Catharina and Katharina. It is pronounced as 'TREE-nah' in both languages.- http://www.meertens.knaw.nl/nvb/naam/is/Trina (in Dutch) - see page 2 of "Limburgse Veurname", a PDF-file containing Limburgish names, which is located at http://www.veldeke.net/1032667881.htm (in Limburgish)It has always been a rare name officially (as short names and nicknames have traditionally rarely been registered as official names in the Netherlands; people have always registered their children by their full names), but not at all informally, at least for people born before the 1970s. After that, the name Catharina decreased in popularity (as did Katharina) and so did its short form Trina. As a result, Trina is now considered a rather old-fashioned name. (Young) Dutch women named Catharina or Katharina today will go by a different and more fashionable short form of the name, such as Cato and Keet.