Andries Bonger (20 May 1861 – 20 January 1936), nicknamed "Dries", was Johanna van Gogh-Bonger's favorite brother. Bonger was a friend of his future brother-in-law Theo van Gogh in Paris. It was through Andries that Johanna and Theo met. He also knew Vincent van Gogh who called him André in letters.
Can we infer the following?
Theo van Gogh was friend's with a man who was referred to as André by Vincent van Gogh. 
Yes