According to HKFA, they are the same person.

Catherine Hun Ga-Jan / (???) http://hkmdb.com/db/people/view.mhtml?i ... y_set=big5

Taap Ga-Jan / (???) http://hkmdb.com/db/people/view.mhtml?i ... y_set=big5

Catherine Hun seem to be the correct one.

Can anyone confirm and update?

Hey, another "aa" to get rid of!

if nobody stops me in 15 days I will merge them

merged:

Taap Ga-Jan
???
Producer
All About Ah Long (1989)
Lucky Encounter (1992)
Production Manager
True Colours (1986)
Planning
A Moment of Romance II (1993)
The Heroic Trio (1993)

and

Catherine Hun Ga-Jan ?
???
Cantonese: Huen Ga Jan
Mandarin: Xuan1 Jia1 Zhen1
Aliases: Huen Ga-Jan, Ga-Jan
???
Producer
The Fun, the Luck and the Tycoon (1990)
Wonder Seven (1994)
Viva Erotica (1996)
Ah Kam (1996)
Moonlight Express (1999)
The Truth About Jane and Sam (1999)
A Fighter's Blues (2000)
Star Runner (2003)
Beyond Our Ken (2004)
AV (2005)
Dragon Squad (2005)
Undercover Hidden Dragon (2006)
Love Undercover 3 (2006)
Naraka 19 (2007)
Playboy Cops (2008)
The Moss (2008)
Butterfly Lovers (2008)
Give & Love (2009)
Production Manager
A Family Affair (1984)
Working Class (1985)
Cupid One (1985)
Happy Ghost III (1986)
The Heroic Trio (1993)
Planning
The Isle of Fantasy (1985)
Goodbye Darling (1987)
Trouble Couples (1987)
Fatal Love (1988)
The Eighth Happiness (1988)
Sisters of the World Unite (1991)
Casino Raiders II (1991)
Three Summers (1992)
Executioners (1993)
Boy and His Hero (1994)
Island Fear (1994)
Urban Cop (1994)
...Till Death Do Us Part (1998)
Marriage with a Fool (2006)
Super Kid (2006)
Men Suddenly in Black 2 (2006)
Love in Macau (2006)
Happy Birthday (2007)
The Pye-Dog (2007)
Executive Producer
Royal Scoundrel (1991)
Blue Lightning (1991)
Lucky Encounter (1992)
Double Tap (2000)
When I Fall in Love - with Both (2000)