Dictionary of Medieval Names
from European Sources

Garet m. A late development from both Gerald and Gerard.

Without a liquid in the second syllable, it is in general impossible to tell which the root name is.

England
Latin
1559 Garrett (nom) StMartF p. 59
Early Modern English
1545 Jarat WillsInv LXXXIV
France
Latin
695 Gerrato (gen) DCEL-2 Add. VII
Spain
Latin
1490 Garret (nom) carbonell-I p. 42
Cite as: S.L. Uckelman. "Garet". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Garet.