The vast majority of "baby" name sites are inaccurate. The origins and meaning given for
Ludwig on this site are backed up by etymological explanations of the elements that make up the name, so it is easy to see where the meaning comes from. The website you've provided gives no information to back up its alleged meaning and makes no claims as to its accuracy.
Lulie comes ultimately from
Ludwig, which is composed of
hlud "fame" and
wig "warrior". The meaning of
Ludwig is also the meaning of Lulie. It is not difficult to see why trendy "baby name" sites would prefer to change Lulie's meaning to "warrior maiden" as it's a far nicer meaning for parents. But that doesn't make it true. There is no part of the name 'Lulie' that corresponds to any Germanic element meaning 'maiden', therefore it does not mean anything to do with 'maiden'.
I will let your rudeness go because you're just a newbie and clearly have no idea how this site works. But please take note for the future: this site and this board are about researched FACTS, not trendy meanings invented or corrupted by sites that want to attract baby-naming parents. Citing "baby name" websites in contradiction of established "Behind the Name" facts will get you scorn and ridicule, not respect.
♦ Chrisell ♦
All we have to decide is what to do with the time that is given us. - J.R.R. Tolkien.