h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

I am trying to translate a phrase found on a family crest and online translators have not provided a translation that makes sense.

Would someone please help?

The phrase is: non sibi solum

Thanks

To me, it looks like 'not to oneself alone', but when it comes to translations I should never be trusted.

That seems right. I know that 'tibi' is 'to you'. So, in view of 'sui generis' ...

Yes, what you say is logical.

I'm fairly sure what I said above was right, however I'm just a student of Latin and so all my suggested translations carry a disclaimer, as I'm more often than not wrong.

Roughly speaking, the dative in Latin corresponds to relations that in English that are expressed by 'to' or 'for', so it means one of

Not only to oneself
Not only for oneself

I was thinking of 'quisque sibi proximus', everyone is closest to himself (if I correctly translated 'ieder is zichzelf het naast' into English)
to shed a little more light on the word 'sibi'.