Documentation is available as a PDF file (in Swedish), readable with Adobe Acrobat Reader. Gunnvôr silfrahárr has added some notes on the sources.
A couple specific warnings: Some of the names are foreign-origin names that were later borrowed into Icelandic or Norwegian use; if you particularly want a Viking-period name, check other sources to make sure that a particular name was actually used in the early period. The spellings are roughly appropriate for the late saga-writing period; again, if you want an early name, you'll need to check other sources. The author gives meanings for name elements. These appear to be correct, but keep in mind that they are really the meanings of the etymological roots of name elements, based on words that often had dropped out of the language centuries before. As a general rule, the etymology of a name was rarely relevent to its use in medieval cultures.
The Medieval Names Archive is published by
Ursula Georges. It was historically published by the Academy of Saint Gabriel.
Copyright on individual articles belongs to their authors.
http://www.s-gabriel.org/names/scandinavian.shtml