After Bundesliga club Union Berlin replied to Mr Lucas with “willkommen,” the Arsenal fan declared they were his “new German team”.
He said the process had taken six months in total and he could now claim a German passport.
Earlier this year, the German parliament voted to lift restrictions that prevented some descendants of German Jews from claiming citizenship.
Those whose ancestors were persecuted by the Nazis, including Roma and Jews, now have an easier path to becoming German.
Lawyer Felix Couchman, who lobbied for the change, told Deutsche Welle at the time the new law was “a milestone”.
He said receiving citizenship was significant as it symbolised “a recognition that a wrong was done to them and their family members and forebears and that is now finally being acknowledged and being corrected.”
