<!-- Graciously derived from https://stackoverflow.com/a/32004173/3033053 -->
{% assign crumbs = page.url | remove:'/index.html' | split: '/' %}

{% for crumb in crumbs offset: 1 %}
  {% if forloop.last %}
    {{ crumb | replace:'-',' ' | remove:'.html' | capitalize }}
  {% else %}
    {{ crumb | replace:'-',' ' | remove:'.html' | capitalize }} /
  {% endif %}
{% endfor %}