Past or Present

Hi All,

I have a confusing sentence that I need a bt of clarification regarding the use of past tense or present tense.

- I bought a car yesterday and it is blue . - We use 'is' because the car was blue yesterday and still is blue today.

- I saw a computer in the shop and it was expensive. - We use 'was' because it was expensive before, and even though it is likely to be expensive now we don't know. Also, this is a completed action in the past.

How abut this one:
- The waiters, who were all dressed in traditional fishermen's clothes, were very friendly and told us about the history of the restaurant whose name was The Jolly Whaler.

So, why are we using 'was'? Is it because the event happened in the past, even though we know the restaurant is still called the The Jolly Whaler?

I know this is basic, but the more I think about it, the more I become confused.

Thanks,
DJ