I wrote a column on this name in
July 2019:
https://omaha.com/lifestyles/evans-bertram-never-caught-on-in-u-s-but-rings-loud-in-shakespeare-lore/article_7d7e9079-dfb7-59c5-92b4-a46ff827ef6e.html
This is the sort of name that most people in the USA are going to dislike until some quirky celebrity figures out
Bertram ends in the same sound as super-popular
Liam and gives it to their son, at which point it would have a good chance of reviving.