You need to add a filter that restricts family name to one language.

<sup>Credit: @[ratface][1], </sup><sup>answering this Q as per [What should I do when an answer has been added as comment?][2]</sup>


 [1]: https://drupal.stackexchange.com/questions/206888/how-to-get-a-two-layer-sort-with-a-taxonomy-term-relationship-and-avoid-duplicat#comment-251978
 [2]: https://drupal.meta.stackexchange.com/questions/848/what-should-i-do-when-an-answer-has-been-added-as-comment