English Wikipedia has an article on:

Gilbert

Wikipedia

From Old French Gislebert, from Proto-Germanic *Gīslaberhtaz, from *gīslaz (“pledge”) +‎ *berhtaz (“bright, famous”), from Proto-Celtic *Gēstloberxtos.

• (General American) IPA^(key): /ˈɡɪlbɚt/

• Audio (Southern England):

  (file)

Gilbert (countable and uncountable, plural Gilberts)

1. A male given name from the Germanic languages.
   • 1605, William Camden, Remains Concerning Britain, John Russell Smith, published 1870, page 81:

     Gilbert - - - because it is written in Dooms-day book Gislebert, I judge it rather to signifie Bright or brave pledge - - - .So it is a well fitting name for children which are the only sweet pledges and pawns of love between man and wife.

2. A surname.
3. A number of places in the United States:
   1. A town in Maricopa County, Arizona.
   2. A small town in Searcy County, Arkansas.
   3. A city in Story County, Iowa.
   4. A village in Franklin Parish, Louisiana.
   5. A city in St. Louis County, Minnesota.
   6. A ghost town in Esmeralda County, Nevada.
   7. An unincorporated community in Muskingum County, Ohio.
   8. An unincorporated community in Monroe County, Pennsylvania.
   9. A town in Lexington County, South Carolina.
   10. A town in Mingo County, West Virginia.
   11. An unincorporated community in Bradley, Lincoln County, Wisconsin.

From English Gilbert, from Old French, from Proto-Germanic *gīslaz (“pledge”) + *berhtaz (“bright, famous”).

Gilbert

1. a male given name from English [in turn from the Germanic languages]

Ultimately from Proto-Germanic *Gīslaberhtaz. (This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

Gilbert m

1. a male given name

Patronymics

• son of Gilbert: Gilbertsson
• daughter of Gilbert: Gilbertsdóttir

From Old French Gislebert, from Proto-Germanic *Gīslaberhtaz, from *gīslaz (“pledge”) +‎ *berhtaz (“bright, famous”).

• IPA^(key): /ʒil.bɛʁ/

Gilbert m

1. a male given name, equivalent to English Gilbert

• female given name: Gilberte

Ultimately from Proto-Germanic *Gīslaberhtaz. (This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

• IPA^(key): /ˈɡɪlbɐt/

• Audio:

  (file)

• IPA^(key): /ʒɪlˈbɛːɐ̯/

• Audio:

  (file)

• Hyphenation: Gil‧bert

Gilbert

1. a male given name from the Germanic languages, equivalent to English Gilbert