1. Ouse British *udso "water" hence OE Üse
1.1 Nar a back formation from Narford OE nearu|ford "a narrow ford"
1.2 Wissey OE wissan|ea "muddy river" G Wiese "meadow"
1.3 Little Ouse
1.3.1 Thet a back formation from Thetford OE theod|ford "ford of the people"
1.4 Lark a back formation from Lackford OE leac|ford "the ford with leeks"
1.4.1 ?
1.4.1.1 Kennet British river name cunetio "cuno" = wolf
1.5 Cam a back formation from Cambridge from Granta British "muddy"
1.5.1 Rhee possibly from Celtic renos (with long e) "to flow" or Rea from "aet thaere ea" (at the water) becoming "atter e" then "atte re" the form Rhee occurs in Warwickshire in 1577. (Ekwall p 382)
1.5.2 Granta British "muddy"
1.5.2.1 Bourne OE burna "stream"
1.5.3 Fulfen
1.5.4 Debden a back formation from OE deope|dene "deep valley"
1.6 West
1.7 Alconbury a back formation from OE Ealhmundes|byrig
1.8 Diddington a back formation from OE Duding|tun "the TUN of Duda's people
1.9 Gallow
1.10 Kym a back formation from OE Cynebaldes|tun "Kimbolton"
1.10.1 Till a back formation from OE Tiles|broc Tilbrook
1.11 Hen
1.12 Duloe
1.13 Begwary
1.14 South
1.15 Ivel British *gablo "forked" (Welsh "gafl")
1.15.1 Flit OE fleot "stream"
1.15.2 ?
1.15.3 Hiz a back formation from Hitchen OE Hiccum a tribal name
1.15.3.1 Oughten
1.15.3.2 Purwell
1.15.4 Cat
1.16 Chicheley from OE cicena|leah "chicken lea"
1.17 Ouzel/Lovat Lovat from Lavant British *levo "gliding"
1.17.1 ?
1.17.2 ?
1.17.3 Clipston a back formation from OE Clipes|tun
1.17.4 ?
1.17.5 Whistle
1.18 Tove from Towcester OE Tofe|ceastre "Roman fort on the Tove" from OE *tof "slow, lingering"
1.19 Padbury a back formation from OE Padda|byrig "Padda's bury"
1.20 ?