Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
A ged is a heraldic term for the fish known in English as a pike. It is often used in "canting" coats; that is, using coats of arms to make a pun on the last name of the bearer, one of his titles, a nickname, or the name of his estate. The word ged is derived from the Old Norsegaddr (spike). The Norse word is the origin of the terms for pike in the modern North Germanic languages: Swedish: gädda, Danish: gedde, Norwegian: gjedde, and the Faroese and Icelandic: gedda.