I'll ask Francesco, but I think that ombra means shadow in Italian. It is also the name of a new Italian restaurant/caff on the end of Vyner Street, just around the corner from where I live in Hackney. My lovely wifey and I had dinner there tonight, we had an Italian cured meat platter between us, steak tartar, spagatini with pesto and potato, and panna cotta, with two glasses of Campari and Prosecco, and three glasses of wine... and it was under 50 quid...
Go, but don't tell anyone, because it will get too busy and too famous and I won't be able to get in any more.