Cyber Security Company name

Hello all,

As stupid as this is, I need opinions! I'm trying to come up with a name for my cybersecurity company. I'm thinking something along the lines of:

1 - Last Name Cyber Security
2 - Last Name Info Security
3 - Last Name Information Security

And what should I do with the domain name? should I abbreviate "Information" as "info" and "Security" as "sec" (ex: lastnameinfosec.com) or should I spell it all out (ex: lastnameinformationsecurity.com)?

The struggle is real.