This is still a pretty short list, as there were only ever a few Dutch library labels to my knowledge. Dutch composers do, however, appear on British, German and Italian releases.
If anybody has any additions, corrections or comments, please don't hesitate to let me know.
The basic key here is:
Real name
or
Real name:
Alias 1
Alias 2
etc.
Martinus J. Agterberg:
Mikecollin
Jacobus H. J. Joseph Aldenzee:
Erga
Isaac Habbo
Hendrik "Henk" Alkema
Dick A. Bakker:
Duke Baker
Michel Banabila
Habbo Robert George Beem:
Brad Palmer
Cornelus Joh. M. "Cor" Bolten:
Carl Kelpy
Rene Odijk
Johannes G. "Hans" Bos
Wilhelm Walther Ernst "Wim" Bosheck:
B. Estacada
Bernard De La Porte
Bill Woodgate
Brendan Gaelic
Dendra Primnie
Derevo Vorota
Erdo Farok
Jan Rap
Orman Pupa
Padure Grilaj (also "Grilay")
Reshetka Gora
Rubin Shalom
Suma Ograda
Franciscus M. H. "Frans" Bronzwaer
Frank A. H. Burks
Paul Cartledge
Joseph David "Joe" Cavanagh
Rudolf W. "Willem" Cramer
Roger Macgregor de Budo Bolton
Ramon Creixams de Herrera
Lambertus J. F. "Bert" Damink
Johanna D'Armagnac de Castanet
Robert J. de Groot:
Robert Jelmer
Jacobus "Co" de Kloet:
Mr. Happy
Sam Orbec
Martinus A. "Martin" de Ruiter:
M. A. Roos
Alain Robert Debray
Oliver Michael "Olli" Dittrich:
Oliver Tim
Christian Eccles-Cannon
Samuel David Edwards
Alexander W. M. "Alex" Eind
Jan A. E. Evers
Donald J. H. M. "Don" Funcken
Roel J. L. Funcken
Johannes P. M. "Hans" Greeve
Christiaan A. "Chris" Grem
Stéphane Jean Pierre Grémaud:
Steve McGrey (also "MacGrey")
Diderik Wigbolt Groen
Marinus C. Groeneveld
Werner U. J. Groeneveld:
Werner Urban
Riccardo Guffanti
Nicolaas R. "Nick" Hall
Willem Hendrikse
Christiaan H. "Chris" Hinze
Betty Eisman Honoroff:
Dan Glick
Frank Arvey
Hendr Holshuijsen Hoogerwaard:
C. Stratus
Casamadera
H. Hennessy
Richard Pinkleton
Johan Hendrik "Johnny" Holshuijsen:
John Woodhouse
Petrus C. Albertus "Peter" Huijing:
Peter Vandyck
Martha H. "Marleen" Huizinga-Viseer
Martha Johanna "Marian" Jansen:
Marian de Garriga
Philip James Jewson
Persijn Joling:
Persino Dakota
Bernardus J. M. "Bernhard" Joosten
Menno Kalmann:
Mann Vann
Mr. Hippy
Tonto Goldberg
Bohuš "Bobo" Kantor
Dimitrios Katis (also "Demetrios", "Dimitris")
Martien Keesmaat
Dirk Keijzer
Dirk J. "Dick" Kemper
Clemens J. Krijger
Onno M. Krijn
Jeroen J. T. Kuitenbrouwer:
Bob Fisherman
Nicolass Barend "Nick" Labuschagne:
Afrique Sol
Alley Beatz
Beat Mix
Dancetown
Fuse Muse
Fusion Mix
Fuzz Box
Jamm King
Multitrax
Music Masters
Musicon
Phat Beats
Post Sounds
Sound Fusion
Spicy Beatz
Supersoul
Sweet Beats
Topic Beats
Eric M. Lensink:
Berend Goedemoed
Tony Josef Valentin Linfjärd
James Loomis:
Hank Dussen
Jim McDeery (also "MacDeery")
Manfred Mauli
Pierre Elsterre
Ralph Lundsten
Patrick Markus
Anastasios "Tasos" Mavroudis (also "Tassos")
Jan Ziginus Meinema
Paul J. Natte:
R. Runfast
Umbertios
W. Wilfur
Pieter P. A. G. Nooten (also "Petrus")
Dennis Thomas Oosthuis:
Allan Hodgson
Dennis East
Gregory Thomas
Rory Thomas
Colin V. Orr
Wijnand V. Ott
Matheus C. T. "Theo" Outhuyse (also "Outhuijse"):
Matthew Christopher (also "Christopher Matthew")
Arie "Eddy" Ouwens:
A. Brikoos
Dave Mac Ronald
Gary Shelter
Paul Post
Monica Pugliese
Gerrit J. "Gerry" Putter (also "Jerry"):
Jerry Turner
Monica M. Reintjes:
Ueniequm
Uniqum
Gerrit "Ger" Romunde:
Gareth John
Glauco Rosignoli
Mitchell Aaron "Mitch" Rothschild
Rosette C. "Rosetty" Ruiter de Verwoerdt:
Constance Martin
Constant De Canard
Rosetty
Yasar Saka
Joshua J. Samson
Robert Christian Schreml
Martin L. A. Seysener
Cornelis "Cees" Slings:
Marcsfather
Johan Peter Smid
Mickey Smid:
Ricardo Avocado
Supercity
Geoffrey Joseph "Geoff" Smith:
Nigra
Fredrik P. "Fred" Snel
Eduard A. J. Edgar "Ed" Starink
Cornelis "Cees" Stolk:
R. van Door
Robert W. J. Strating
Bouke te Pas
Kees A. Tel:
Carlos Mirar
World Citizens
Jeroen Tenty:
Jan Veel
Frido ter Beek
Jacob A. K. ter Veldhuis:
JacobTV
Geert Thaens:
Brotherhood 66
Rolf "Son" Thomsen
Richard "Rick" Ulfik
Wayne Tyron "Ty" Unwin
Arthur J. L. Valkieser:
John Richards (somewhat uncertain*)
(*note - no direct IPI connection found. This artist is NS, but had tracks co-written by Henk Bout listed under BUMA/STEMRA, and the latter does not have any alias connection to "John Richards".)
Wouter H. van Bemmel:
Jack van Bemelen
Michael G. E. "Mike" van Dalm:
Michael Charter
Mike Dalmon
Niels van der Leest
Jan Baptist "Ties" van der Linden
Johan "John" van der Lugt:
Vaikhari
Petrus A. "Peter" van der Sande:
Peter Sands
Marcel van der Schot
Gemma B. W. M. van Eck (also "Vaneck")
Peter J. van Epen:
Kevin Kestrel
Paul Pack
Roderick Ruysdael
Petrus C. "Peter" van Haastrecht
Arjan P. van Lierop
Edward L. M. "Ed" van Otterdijk (also "van Otterdyke"):
Kedrijto
Dico J. van Putten
Franciscus H. M. "Frans" van Steijn (also "Steyn"):
Simon Shark
Eelco B. van Zanten:
Elliott Thrill
Roko Dragonbreath
Thrilling Bill
Jonathan John Karel F. "Jona" Vanderwal
Ward K. "Camil" Veenstra:
V. Camiel
Paulus W. M. "Paul" Vens
Dirk Jozef Marguerite "Pieter" Vercampt
Anthony J. "Toon" Vieijra (also "Tony", "Vieyra")
Rudolf H. "Ruud" Voerman:
Rudy Carter
Adrianus H. M. "Ad" Wammes
Jonathan Charles Anthony Washbrook:
Jonathan Kaldor
Tim H. Welvaars
Cathy Wester
