Many good points are made here, from both sides of the discussion.
It so happens that, while working on a river blindness control project in Nigeria in the mid-90s, one of my colleagues was named "Yomi" so, the very first time i saw "Yomi name" in outlook, I thought that somehow, my old friend had gotten in touch with me!!
And, until now when I finally explored this question, it's been a puzzle.
My suggestion to Microsoft: If it is deemed necessary to include "Yomi name", add a brief explanation so that, the vast majority of users (who will not bother to google this question) won't
be puzzled like I've been, until this moment. Thanks