Is there a symbol or crest used at funerals for Japanese grandmothers?

I took a stone from my grandmas house and would like to paint her name in Japanese and was wondering if there is anything else I should put? Maybe something that would traditionally be seen at funerals? Or is just name fine?

https://www.reddit.com/r/japan/comments/10u8lvw/is_there_a_symbol_or_crest_used_at_funerals_for/