theme-members.html

{% assign filtered_people_1 = site.people | where:'team', include.team1 %}
{% assign filtered_people = filtered_people_1 %}

{% if include.team2 %}
{% assign filtered_people_2 = site.people | where:'team', include.team2 %}
{% assign filtered_people = filtered_people_1 | concat: filtered_people_2 %}
{% endif %}

{% assign grouped_people = filtered_people | uniq | group_by: "theme-filter" | sort: "name", "last" %}

{% include filter-people.html members=grouped_people %}