Hello Ulrich. I'm glad you have recovered from your accident. If my high school German is right, you are asking "What is that?"
The manuscript looks like an oldie. You annotated αβρααμ (αβ)ρααμ. My guess is that αβρααμ appears twice, the first time at the end of Mat 1:1 and the second time at the start of Mat 1:2. But in the second appearance the letters αβ are incomplete, the alpha lacking part of the diagonal stroke and the beta lacking the vertical stroke, these having been worn away by time.