Il 03/09/20 11:38, Henning Hraban Ramm ha scritto:
> Hi Massi, thank you!
> 
>> Am 03.09.2020 um 11:09 schrieb mf <massifr@fastwebnet.it>:
>>
>> This should be exactly what you asked for:
>>
>> \defineprocessor[passim][right=\quad{\it passim}]
> 
> I didn’t think to use processors.

You need them to get the "passim"; if you include it in the name, then 
you should adapt also the \seeindex like this:

\seeindex{Ramm, Hraban\quad{\it passim}}{}
\seeindex{Hraban}{Ramm, Hraban\quad{\it passim}}

(i did not test it, i don't know if it works, and anyway i don't like it 
because it's not clean)

> 
>> \seeindex{passim->Ramm, Hraban}{}
> 
> No, this results in
> "Ramm, Hraban passim see passim"
>

Only with check=yes, otherwise it works right.

> And
> \index{passim->Ramm, Hraban}
> results in
> "Ramm, Hraban passim 1"
> 

No, see attachment page 2.

> I.e. I’m still looking for an index entry without "see" or page number.
> 
> 
>> \placeindex[check=no]
> 
> This is essential for references to not (exactly) existing entries, I forgot the option existed.
> 

Use check=yes

Massi