Richard..errr...I mean Jason

Since we have moved to Prague we have found that "Jason" is a difficult name. The Czech people just aren't familiar with it and to say it in Czech would sound like "Yason". Richard, Jason's middle name, is much easier to understand. Our landlords always call Jason, "Richard". They see his name on the lease documents and have changed our mailbox to say "Jason Richard" but for whatever reason they just can't seem to remember "Jason". I can understand this since I sometimes find it difficult to remember a name that I'm not familiar with. We started making dinner reservations using either "Richard" or "Maria" and it has worked fine. The issue came up again this morning when our neighbor so nicely left us a bottle of wine with a note to say Happy Thanksgiving. The note was addressed to "Richard & Mary". We had to smile and laugh...who would have ever thought "Jason" would be a name so given to mistakes?