i dont think they are all that similar tbh. the sound is a little alike but the names are quite different.
i have always liked the name hollie. but i named my dog hollie. and i have this thing where i cant name an animal or person the same name as one i;ve already had- so even if my dog died, i couldnt call my baby hollie.
that said, my parents bred siberian huskies. and i remember a lot of names which i liked- and i have used a couple partly in my kids names. we had one named jazz and dd2 got jasmine for her middle name. we had a willow, and dd3 has willow for her middle name. i couldnt use them as first names however as they 'define' the animal, or other person if it was a person i knew. but that is when you are talking about exact names. similar names would be different. like, i have a niece named hayley. but i wouldnt hesitate to call a son hayden (only, now i wont out of respect as a friend had a stillborn whom she named hayden) cos even though they are similar they are not the same iygwim?