Oh wow, I found a fantastic obsolete kana the other day! I guessed several different things I thought it might be but kept coming up wrong! Have a think about what it is (maybe have a little look through my obsolete kana tag if you like), and then click through to find out if you were right!
Because character input doesn't support the kana, the restaurant lists itself as お多幸, read Otakō. That's right, this is an obsolete た! That really surprised me......
I suppose I can feel the similarities in stroke order/writing motion, but still, wow! I really need to learn more kuzushiji. (I got an app, but I keep not doing it.) Anyway!
多 means many, much, or frequent. It's read おお.い, まさ.に, まさ.る, or タ. It happens to be the source of katakana タ, whereas hiragana た comes from 太.
幸 is new to this blog! It means happiness, blessing, or fortune. It can be read さいわ.い, さち, しあわ.せ, or コウ.
Finally, if you take the honorific お off お多幸, you do get a surname: Takō! Which belongs to about 10 people nationwide, making it Japan's 90,180th most common surname.