Otto

From Rycharde, from Richard, from Richardus and Ricohardus, from Rīkahard, from Rīkaharduz, a construction Cognate with t=Richard

Latinised short form of compound names ending in -lind, t=tender, soft (English -inda), such as Sieglinde and Dietlinde, and earlier names such as and, from linþaz, whence also t=gentle, mild, pliable, limber

Anglicized from Raghnall, itself derived from Rǫgnvaldr, from rǫgn + valdr, later partly merged with the Continental Germanic equivalent Reynold

The usual U

From Frank, partially from Franca; and partially from Franc, and/or Francus, from Franko; both maybe from frankô

Medieval short form of - compound names beginning with gari or geri ("spear"), such as Gerard, Gerald or Gerbert

Shortened from Caroline

A number of places elsewhere