Did you ask their permission etc. that you could use it too? An ex-colleague of mine named their 5 year old DD a name that I want to use for my baby due in July. I left my job 3 years ago and now see the ex-colleague once a year or so, I wouldn't call her a friend anymore just because we haven't kept in touch well iykwim. When we do see each other it is through other colleagues arranging things etc.
So, should I ask her approval etc. or just avoid the name? How close do you have to be to somebody to have to do this?!!