Search free text responses for proper names

We have more than 15,000 free text comments from our NPS survey respondents, growing by 500+ comments a week. Many of those comments mention individual staff by name - usually in a flattering way, but sometimes in a very derogatory way. We edit the latter to remove the staff name, but we also want to mine the positive comments for staff mentions so we can recognise/reward those staff. It happens informally at the frontline of care (we're a hospital group) but we also want to send a shout out from head office every now and then. Does anyone know if there is a way to do this? For example, to search for terms which begin with a capital letter - that wouldn't capture all of the relevant comments but it would find most.