Should I include the names of my Master's and PhD supervisors in my CV?
Additionally, your supervisors might have written you letters of recommendation for grad school (or could in the future for other grant applications). Thus, mentioning your former supervisors is a form of acknowledgement and transparency for other researchers or research institutions.  I totally agree with the former comments that in 90 %, it won't harm you.  In case you are completely unsure, you could ask your former supervisors whether they are okay with it (but I would be surprised if there is an academic scholar who says no)