It really depends on the family member and probably where they live. Here is a Southern perspective. I have heard it pronouncedmany ways. It is part of my name and I pronounce it like "angle" but...
Dad: Charles Wadsworth Camp-Occupation: Writer, Critic, Former Correspondent-Died in 1935Mom: Madeleine L'Engle-Occupation: Pianist-Encouraged her daughter to write at an early age