Aiden Markram started his Test career with 97 against Bangladesh in 2017-18. His surname appears to be the longest example of a palindromic name among Test players.
The previous record (if one may call it that) was by Rangy Nanan who played one Test for the West Indies in 1980-81. There are 3-letters palindromic surnames like that of Arun Lal. The player generally known as S. Madan Lal actually had the surname Sharma.
Moving away from cricket, there was the Cambodian leader Lon Nol (who was overthrown by the non-palindromic Pol Pot) and Malayalam, the language spoken in Kerala state. This state has produced relatively few international cricketers, examples being S. Sreesanth and Sanju Samson. There is also Karun Nair, though he has not spent much time in that state.
More about palindromes and palindromic surnames here: https://en.wikipedia.org/wiki/Palindrome .
The longest palindrome generally known is “Able was I ere I saw Elba”, allegedly declared by Napoleon. A Canadian specialty is “He peed deep, eh?”, allegedly said by one Mountie to another while examining a yellow stain in the snow.
Tail piece: Along the way I discovered the Quetta-born cricketer Arun Lal, who is one of Baluchistan’s leading first class players: http://www.espncricinfo.com/pakistan/content/player/39834.html