Ingardef.Old Icelandicing(i), of uncertain origin but perhaps identical with the god name Ing or Yngvi, also of uncertain origin + Old Saxongard, Old High Germangart 'enclosure, protection; yard, garden'.
Cite as: S.L. Uckelman. "Ingarde". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 3. http://dmnes.org/2016/3/name/Ingarde.