Cattle Naming Convention

Ever since we started investing into backyard cattle raising we're into Paalaga or Paiwi system in which it allows us to help small time farmers to have the opportunity to own a cow by taking care of other people's cow.
As we all know Paalaga or Paiwi system is all about sharing the siblings. Say if a farmer takes care of your cow the first sibling would be the farmer's share then the next one will be the owner's and so on and so forth.
Now the issue that I encountered lately as a cow owner is that I lose track of whose share would it be and the naming convention of the cow on whose taking care of it. So what I did is create a spreadsheet naming the cow to the farmer or previous owner. Say for example the name of the care taker is Manuel Sales. So the name of the cow will be Manuela and the siblings of Manuela will be named as Manuela 1, Manuela 2 etc. As of now this method seems working and it's easier to track the cattle.