AOS name issue I am confused.help please

[EP&PE 6]

Hello everyone.

In my passport,visa and I 94 this is the display of my names :

Surname:AAAA (my father name) BBBB

Given name:CCCC DDDD (both of them first name).

For the k-1 petition in all the forms I write BBBB as my middle name.

My question is: what is the meaning of surname here in US?Should I use all my two surname as last name in the marriage lincense?orjust the AAAA ( father name)

In all the AOS forms should I replace all my surname (AAAA BBB) by my husband last name or should I just replace my father name (AAAA)by my husband name.please help

[EP&PE 6]

Please help