DD has a name which we shorten 90% of the time. The shortened version ends in y but could also be spelt ending in ie.
OK sod it. Easier to explain with real name - shes Emily. We shorten to Milly. Using a y because that matches Emily. ILs always spell it Millie even though I always put Milly when texting MIL or sending cards or whatever.
They are very generous with gifts and often get her named things - spelt Millie - but then you rarely see Milly things in shops. However the birthday cake they had iced for her said Millie and they have written it on her Christmas card.
They are really lovely, involved grandparents which is the most important thing and I really value them. They can be a bit misguided sometimes e.g. they genuinely think Fruit Shoots are healthy fruit drinks and they don't look into the details of things too much, I am sure they already think I'm a bit anal/control freak as it is.
I really don't want to make a fuss over nothing and can't think of a casual way to mention it to them, but DD is now 3 and starting to get interested in the letters in her name. At preschool she is Milly and so thats how she'll learn to write her name.
What would you do?