We found one dictionary that defines the word know sb to speak to:

General (1 matching dictionary)

1. know sb to speak to: Cambridge Advanced Learner's Dictionary

▸ Words similar to know sb to speak to ▸ Usage examples for know sb to speak to ▸ Idioms related to know sb to speak to ▸ Wikipedia articles (New!) ▸ Words that often appear near know sb to speak to ▸ Rhymes of know sb to speak to ▸ Invented words related to know sb to speak to