You may use map and Convert you data as you required:
try below:
import pandas as pd
df = pd.DataFrame({'name':['geeks', 'gor', 'geeks', 'is','portal', 'for','geeks']})
df['name']=df['name'].map(lambda x: x[:2].upper()+x[2:])
print (df)
output:
name
0 GEeks
1 GOr
2 GEeks
3 IS
4 POrtal
5 FOr
6 GEeks
1
solved Convert first 2 letters of all records to Uppercase in python