بسم الله الرحمن الرحيم
(Fatwa: 1304/1113/N=01/1440)
(1) Zayyan means the one who decorates too much, Embellisher, thus you may keep the name Zayyan.
(2) There are some other names , you may keep any of them if you like:
Abdullah, Abdur Rahman, Abdur Rahim, Abdul Haq, Alimul Haq, Fahimul Haq, Saeedul Haq, Muhammad Abdullah, Muhammad Abdur Rahman, Muhammad Ahmad, Muhammad Ibrahim, Muhammad Yahya, Muhammad Abu Bakar, Muhammad Umar, Muhammad Usman, Muhammad Anas, Muhammad Furqan, Muhammad Affan, Muhammad Fauzan, Muhammad Saleh, Muhammad Muzammil, Muhammad Sulaiman, Muhammad Salman, Muhammad Sauban, Muhammad Talha, Abu Ubaidah, Muhammad Tahir, Muhammad Huzaifah, Muhammad Khalid, Muhammad Muavia, Muhammad Shuaib, Muhammad Sadiq, Muhammad Ibrahim and Muhammad Saleh etc.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband