How can I filter get-mguse based on a variable coming from a file?

Question

How can I filter based on a variable coming from a file: foreach ($own in import-csv -path c:\Users\580616\DistinctOwners.csv) {(get-mguser -consistencylevel eventual -filter (displayname eq "$own.owner"))} ?

This way I get: "the term 'displayname' is not recognized ..."

foreach ($own in import-csv -path c:\Users\580616\DistinctOwners.csv) {(get-mguser -consistencylevel eventual -filter "(displayname eq $own.owner)")} ?

This way I get, "Invalid filter clause"

I expect to get a list of users.

But this one works fine, it just doesn't get the user details: foreach ($own in import-csv -path c:\Users\580616\DistinctOwners.csv) {(echo "$own.owner")}