RtS;
you may be being a little unfair on your neighbours. They might not be Arsenal fans.
Apart from the extra 'L' added to the reversed name, it may be a referebnce (legitimately) to Saint Esra. A quick Google finds nothing about the saint, but a street name in Dublin: St. Esra Close. Althought the Wiki entry doesn't look promising: Explanatory note


A new streetname, based on the understanding that the second element in the placename Cill Easra (Killester) is a saint's name. There is no evidence for such a saint.

Cheers
Nigel