PARKE wrote on Yesterday, 09:14:

Do mobile chips with the same CPUID come with the same nomenclature ?

Often, but it would be wise to check what CPU World and/or Wikipedia says.

I added all the P4 Celerons and noted:

1. Celeron socket 478 + CPUID 0F1n should have Willamette
2. Celeron socket 478 + CPUID 0F2n should have Northwood
3. Celeron D 90-nm should have Prescott
4. Celeron D 300 should have Cedar Mill
5. Why do some have issue double and others just double?

In my opinion some are accidentally entered two times by the people who typed the data or one of the two identical S-Specs is incorrect and some may actually have been produced with identical S-Specs - like for example the PII SECC you are discussing. The jury is still out for that one imo.

PARKE wrote on Yesterday, 13:34:

The jury is still out for that one imo.

OK, I have been adding P4 Mobile.

1. Mobile P4 90-nm should have Prescott
2. Mobile Pentium 4-M should have Northwood
3. Mobile P4 533MHz fsb should have Northwood
4. Why are Mobile Pentium 4-M and Mobile P4 533MHz fsb very different when it's much the same CPU?

Thanks for all the additional names. The Mobile P4 90-nm from pdf 302441 is later and supports hyper-threading.

PARKE wrote on Yesterday, 15:26:

The Mobile P4 90-nm from pdf 302441 is later and supports hyper-threading.

OK, however I was really asking, why do the two Northwoods have very different names? Looking further one is Mobile P4 533MHz fsb

Also I noted below, given the 400MHz FSB then 2.33 GHz is impossible and https://www.cpu-world.com/sspec/SL/SL789.html says 2.30 GHz.

SL789 checked D1 0F29h 2.33GHz/400MHz Mobile Pentium 4-M 512KB sep 2002 35 1.3 400 2333.00 23 RK80532GC052512SL789 Malay

I have added more and noted:

1. Mobile Celeron 18u should have Coppermine
2. Mobile Celeron 13u + CPUID 068n should have Coppermine
3. Mobile Celeron 13u + CPUID 0x6Bn should have Tualatin