"Personal acquaintance" refers to someone you know or have met in person. It implies that you are familiar with them on an individual level and have a personal relationship or connection with them. Full definition
Just as you evaluate potential business partners, employees and personal acquaintances on your first - time encounter with them, others will judge you and your business by how you conduct yourself. (entrepreneur.com)
Generally they belong to the same social group and so have more shared values and extensive personal acquaintance. (religion-online.org)
I'm delighted with my success so far, and yet compared to many indie authors just drawn from my own personal acquaintance, my success is absolutely small potatoes. (writerunboxed.com)