"come to my aid" is correct and usable in written English. You can use it when you are asking someone to help you or support you in a difficult situation. For example: I am struggling with this project; will you please come to my aid?.
I prayed for Rumpelstiltskin to come to my aid.
"That if ever I go whoo, whoo you will drop everything and come to my aid".
"It's that you will come to my aid, in whatever form I need, when I have difficulty.
Matthews". "Ah, an Irish girl has come to my aid," Matthews said, placing his hand gently on the woman's shoulder.
I felt very protected by them – I knew if anything went wrong, they would come to my aid.
"Ah, an Irish girl has come to my aid," Matthews said, placing his hand gently on the woman's shoulder.
The only person who came to my aid was another American, who was traveling with me.
Kevin Rudd and his daughter, Jessica, immediately and graciously came to my aid.
The pianist André Watts, who gave our inaugural concert on Nov. 23, 1980, at Davies Symphony Hall, came to my aid.
Clinical colleagues came to my aid by rating neurodevelopmental disorders on an ad-hoc four-point severity scale.
"The homeless woman got me away from the others and then a retired military guy walking past came to my aid," he said.
When I feel like I can't trust my brain 100%, Ludwig really comes in handy. It makes me translate and proofread faster and my output more reliable.
Claudia Letizia
Head Translator and Proofreader @ organictranslations.eu