Pledge or hostage
Gitzel is a diminutive form of the Germanic name Giselle. It stems from the Old High German word 'gisil', which historically referred to a person given as a pledge or hostage to ensure a treaty.
Less common today
Gitzel isn't in the latest US Top 1000. It last peaked at #12,742 in 2005.
US births per 5-year period, 1990βpresent (SSA data).