The Billing Rollography1 lists the following pseudonyms used on Piano Rolls actually authored by J. Lawrence Cook:
Bob Alden
Ted Baxter
Tom Blake
Pep Doyle
Joseph Hilliard
Eubie Jones
Sid Laney
Osborne & Howe
Raymond O'Brien
Alfred Parker
Walter Redding
Freddie Scott
Harold Scott
Al Sinclair
George Stanley
Fats Waller
Jeff Watters
Pete Wendling (after Wendling left QRS in 1925)
Cal Welsh
Bob Williams, Jr.
Some of these names were QRS "house pseudonyms" used by several real arrangers, so not all the rolls credited to them are necessarily the work of J. Lawrence Cook.
J. Lawrence Cook considered Sid Laney to be his "official pseudonym" which he chose himself: 'Sid' was from Sydney, Australia and 'Laney' was from Lucy Laney who was principal of the boarding school (the Haines Normal & Industrial Institute) in Augusta, GA that Cook attended from 1912.
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1. The information on this page is taken
from
The Billings Rollography (Rock Soup, 1994), Volume 3, QRS Pianists
1917-1934 and Volume 5, QRS Pianists, History 1934-1994. The
Billings Rollography is a five-volume set
of QRS Company History & Memorabilia compiled by Ginny & Bob Billings
and published by them. They may be contacted at 14010 Rim Rock Drive,
Reno, NV 89511-7347, U.S.A.