Correct

联名

/ liánmíng / 
Strokes

Definition

jointly (signed, declared, sponsored)

Example

As a Verb

sign jointly

1
Liánmíng
联名
shàngshū
上书

submit a joint petition

2
Liánmíng
联名
fāqǐ
发起

jointly initiate/sponsor

3
Liánmíng
联名
fābiǎo
发表

jointly publish