The following in an excerpt from a children's book, "Captain Underpants and the Perilous Plot of Professor Poopypants" by Dave Pilkey:
The evil Professor forces everyone to assume new names...

Use the third letter of your first name to determine your New first name:
a = poopsie
b = lumpy
c = buttercup
d = gidget
e = crusty
f = greasy
g = fluffy
h = cheeseball
i = chim-chim
j = stinky
k = flunky
l = boobie
m = pinky
n = zippy
o = goober
p = doofus
q = slimy
r = loopy
s = snotty
t = tulefel
u = dorkey
v = squeezit
w = oprah
x = skipper
y = dinky
z = zsa-zsa

Use the second letter of your last name to determine the first half of your new last name:
a = apple
b = toilet
c = giggle
d = burger
e = girdle
f = barf
g = lizard
h = waffle
i = cootie
j = monkey
k = potty
l = liver
m = banana
n = rhino
o = bubble
p = hamster
q = toad
r = gizzard
s = pizza
t = gerbil
u = chicken
v = pickle
w = chuckle
x = tofu
y = gorilla
z = stinker

Use the fourth letter of your last name to determine the second half of your new last name:
a = head
b = mouth
c = face
d = nose
e = tush
f = breath
g = pants
h = shorts
i = lips
j = honker
k = butt
l = brain
m = tushie
n = chunks
o = hiney
p = biscuits
q = toes
r = buns
s = fanny
t = sniffer
u = sprinkles
v = kisser
w = squirt
x = humperdinck
y = brains
z = juice

Now send me your new names and I'll list them here for posterity - thanks to Poopsie Waffle-Fanny (Shas) for sending me this.