lwc.js

import getByNames from '@salesforce/apex/OpportunitiesSelector.getByNames';
export default class Operatunity extends LightningElement {
    async connectedCallback() {
        const [contacts, accounts, opportunities] = await getByNames({names: ['foo', 'bar', 'qux']})
    }
}

OpportunitiesSelector.cls

public with sharing class OpportunitiesSelector {
    @AuraEnabled public static Object[] getByNames(String[] names) {
        Contact[] contacts = [SELECT Id FROM Contact WHERE Name = :names];
        Account[] accounts = [SELECT Id FROM Account WHERE Id IN (SELECT AccountId FROM Contact WHERE Id = :contacts)];
        Opportunity[] opportunities = [SELECT Id FROM Opportunity WHERE AccountId = :accounts];
        return new Object[]{
                contacts,
                accounts,
                opportunities
        };
    }
}