Potential face claims for Merope Gaunt:

NAME: Nora-Jane Noone
DATE OF BIRTH: 8 March 1984
NATIONALITY: Irish
EYE COLOUR: blue
HAIR COLOUR: dark brown

NAME: Meng Meng Wei
DATE OF BIRTH: 1993
NATIONALITY: Chinese and Japanese
EYE COLOUR: brown
HAIR COLOUR: black

NAME: Estelle Chen
DATE OF BIRTH: 4 March 1998
NATIONALITY: French
EYE COLOUR: black
HAIR COLOUR: black

NAME: Angela Sarafyan
DATE OF BIRTH: 30 June 1983
NATIONALITY: American and Armenian
EYE COLOUR: blue
HAIR COLOUR: brown

NAME: Lily James
DATE OF BIRTH: 5 April 1989
NATIONALITY: British
EYE COLOUR: brown
HAIR COLOUR: brown/blonde

NAME: Charlotte Gainsbourg
DATE OF BIRTH: 21 July 1971
NATIONALITY: French and British
EYE COLOUR: brown
HAIR COLOUR: brown

NAME: Dichen Lachman
DATE OF BIRTH: 22 February 1982
NATIONALITY: Nepali and Australian
EYE COLOUR: brown
HAIR COLOUR: brown/blonde

NAME: Joey Wong
DATE OF BIRTH: 31 January 1967
NATIONALITY: Taiwanese and Hong Kong
EYE COLOUR: dark brown
HAIR COLOUR: black

NAME: Emily Perkins
DATE OF BIRTH: 4 May 1977
NATIONALITY: Canadian
EYE COLOUR: blue
HAIR COLOUR: black/brown/blonde

NAME: Stacy Martin
DATE OF BIRTH: 1 January 1991
NATIONALITY: French and British
EYE COLOUR: brown
HAIR COLOUR: brown

(suggested by kencbi)