Val·de·mar I 
(väldə-mär′) or Wal·de·mar I (wôl-, väl-) Known as "Valdemar the Great." 1131-1182.
(väldə-mär′) or Wal·de·mar I (wôl-, väl-) Known as "Valdemar the Great." 1131-1182. Danish king (1157-1182) who extended his realm and, with his sons, strengthened the monarchy.