She has quite a few grandchildren-- here are two from the Wilding side--

Tarquin Wilding, and Naomi de Luce Wilding. Their grandfather was British actor Michael Wilding, Elizabeth's second husband.
Do you see a resemblance? I think I can see both grandparents in them; definitely the sort of lean, rangy looks of grandfather Michael Wilding. There's Liz there too-- Eyebrows? Naomi's beautiful eyes and widow's peak? Something about Tarquin's gentle expression here, lower face?
(Off topic-- "Tarquin" is a neat name from ancient Rome -- the Brits seem to favor it-- the only other modern Tarquin I'm aware of is Tarquin Olivier, Laurence Olivier's son...)
Michael Wilding:

Famed photographer Yousuf Karsh caught Elizabeth as a young girl...

What similarities do you see?