So, I found this in an article about 'Miss Potter'
"Matyelok Gibbs has spent a lifetime stealing scenes from people with far bigger roles than hers: like all great actors, she has mastered the look, the stillness that draws the eye far more than the flamboyant.
Gibbs – her first name Matyelok comes from her Russian mother "
http://www.behindthename.com/pnl/167578