I think 8051, PIC and ARM are the trade name not a company

Intel, Atmel, NXP, Microchip, Silicon Labs, STMicroelectronics, Texas Instruments, Cypress & more.

These are company name's who makes microcontroller

 

I think 8051, PIC and ARM are the trade name not a company

Intel, Atmel, NXP, Microchip, Silicon Labs, STMicroelectronics, Texas Instruments, Cypress & more.

These are company name's who makes microcontroller

You don't need to think.
Each of those things has a wiki you can read.

 

I don’t have any experience on microcontroller and I want to start getting in. I always confuse with Microcontroller and their manufacturers. I have explained the name of the manufacture and the product made by them.

8051 : P89V51RD2 is Microcontroller of 8051 family made by NXP

PIC : PIC16F877 is Microcntroller of PIC family made by microchip

AVR : ATmega16 is Microcontroller of AVR Familly made by Atmel

ARM : LPC1768 is a Cortex-M3 microcontroller made by NXP

I have doubt, Is the information given by me correct ?

No mater how much you know or ignore about micros, your quest would be better served just by doing an educated search via Google, typing the relevant names for each line of your post.

Too generic questions, demanding long posts as a reply are better served as I suggest.

Where forums excel at is in the details.