Given time I'm sure one can get used to KJFK - EHAM being Jamaica to Haarlemmermeer, to mention but one.
Not sure I get the point, but this new database contains 27 routes between KJFK and EHAM, with airport names of John F. Kennedy International Airport and Amsterdam Schiphol. Are you sure you're using the new database?
CKS203, CKS206, CKS9533, DAL80, DAL81, DAL8775, DAL8805, DAL8806, KLM641, KLM642, KLM643, KLM644, KLM646, KLM647, KLM648, SOO6170, SOO6171, SOO6173, TFL293, TFL295, TFL297, TFL517, TRA473, TRA8253, TRA833, UAE9914, UAE9936