‘Laangegronn’ is an old name for the way from Neudorf to Findel.
‘Laang’ means long. A 1994 history of Neudorf in the city magazine Ons Stad says the stretch from the former game park to Findel was called ‘am Laangegronn’ then, as it is now. The park belonged to Peter Ernst von Mansfeld, governor of Luxembourg, who died in 1604. Laangegronn is also the Luxembourgish name of the Rue du Grünewald.