The closest match I could find was the name Landry; it's an male name of English/Anglo-Saxon origin meaning "ruler of the place," or "Rough Land." Lantry is likely just a form of the name.
Check out the following links:
http://www.baby-names-plus.com/boy_names_l/boy-baby-name-landry.htmlhttp://www.babychatter.com/lboy.htmlhttp://parenthood.com/babynames_searchresults.html?searchName=Landry