Find relation between data using regression • /r/MachineLearning

I was told it was called data-mapping. I want to use regression to find out a relation between two persons' data. For example, if the person A and person B are going to the same location, and working for the same company, staying at the same address then high chances they can be partners and relatives at the same time. At the same time if the person A and person B are working at the company with the same salary but staying at a different location, high chances, they are just working colleagues. This is just a vague example and any machine learning approach will be appreciated.