I found this very pretty Philo in bot garden, but it was only marked as Philodendron sp.
It looks very similar to P. mamei, though with MORE variegation. and then i found P. 'Silver Cloud' which seems to be a hybrid of P. plowmanii and P. mamei. and i do see images of P. plowmanii 'Silver cloud' and P. mamei 'Silver Cloud' on nursery sites - which look to be the very same plant.
it seems to me that 'my plant' looks like P.'Silver Cloud'. or is there some other hybrid close enough?
1st pic is of smaller younger leaves, 2nd is of the largest leaf and 3rd the overall 'clump'