Finding similar / same item from different lists


This might be a basic question (or not) but basically I have an item from a list with a name field and I am trying to find the item which contains a similar name field in another list.

Search for doesn’t work in this case I think, I tried intersect but it doesn’t seem to be the solution.

To better understand my issue I’ve got a repeating group with check-boxes with each checkbox corresponding to an item of list A, I want the check-boxes to be dynamically checked if list B corresponding item with the same name as list A item is checked.

Not sure I’ve been clear enough don’t hesitate to ask for more details.

Thank you very much