In G mail, when we want to write an email to multiple recipients in such a way that the recipients couldn't understand that we have sent the same email to others, where should we write the recipient's name?

Bcc

Explanation:

Every recipient email address you enter into the “to” and “cc” fields will be able to see each other. The email addresses you add to the “bcc” field will not be visible to the “to” and “cc” recipients or the other “bcc” recipients.

BCC (Blind Carbon Copy)

Hope it helps sorry if I am wrong..